{"id":2655,"date":"2021-10-14T21:17:49","date_gmt":"2021-10-14T14:17:49","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=2655"},"modified":"2021-10-14T22:11:10","modified_gmt":"2021-10-14T15:11:10","slug":"kien-thuc-ve-trung-die%cc%89m-cu%cc%89a-doa%cc%a3n-tha%cc%89ng-hoc-tot-toan-6","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/kien-thuc-ve-trung-die%cc%89m-cu%cc%89a-doa%cc%a3n-tha%cc%89ng-hoc-tot-toan-6\/","title":{"rendered":"Ki\u00ea\u0301n th\u01b0\u0301c v\u00ea\u0300 trung \u0111i\u00ea\u0309m cu\u0309a \u0111oa\u0323n th\u0103\u0309ng \u2013 H\u1ecdc t\u1ed1t to\u00e1n 6"},"content":{"rendered":"\n<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n<p>\u01a0\u0309 ca\u0301c ba\u0300i vi\u00ea\u0301t tr\u01b0\u01a1\u0301c, chu\u0301ng ta \u0111a\u0303 ti\u0300m hi\u00ea\u0309u v\u00ea\u0300 ca\u0301c ki\u00ea\u0301n th\u01b0\u0301c v\u00ea\u0300 tia, \u0111oa\u0323n th\u0103\u0309ng, ca\u0301ch so sa\u0301nh \u0111\u00f4\u0323 da\u0300i \u0111oa\u0323n th\u0103\u0309ng. Trong ba\u0300i vi\u00ea\u0301t na\u0300y, chu\u0301ng ta se\u0303 ti\u0300m hi\u00ea\u0309u v\u00ea\u0300 trung \u0111i\u00ea\u0309m cu\u0309a \u0111oa\u0323n th\u0103\u0309ng. Th\u00ea\u0301 na\u0300o la\u0300 trung \u0111i\u00ea\u0309m? Ca\u0301ch ti\u0300m trung \u0111i\u00ea\u0309m cu\u0309a m\u00f4\u0323t \u0111oa\u0323n th\u0103\u0309ng la\u0300 gi\u0300? T\u00e2\u0301t t\u00e2\u0300n t\u00e2\u0323t ca\u0301c ki\u00ea\u0301n th\u01b0\u0301c se\u0303 co\u0301 trong ba\u0300i vi\u00ea\u0301t sau:<\/p>\n\n\n\n<p>\u0110i\u0323nh nghi\u0303a<\/p>\n\n\n\n<p>HI\u0300nh 1<\/p>\n\n\n\n<p>Trong hi\u0300nh 1, M la\u0300 trung \u0111i\u00ea\u0309m cu\u0309a \u0111oa\u0323n th\u0103\u0309ng AB:<\/p>\n\n\n\n<p>M n\u0103\u0300m gi\u01b0\u0303a A va\u0300 B.<\/p>\n\n\n\n<p>Khoa\u0309ng ca\u0301ch t\u01b0\u0300 M \u0111\u00ea\u0301n A b\u0103\u0300ng khoa\u0309ng ca\u0301ch t\u01b0\u0300 M \u0111\u00ea\u0301n B.<\/p>\n\n\n\n<p>Ca\u0301ch ve\u0303<\/p>\n\n\n\n<p>Hi\u0300nh a\u0309nh minh ho\u0323a<\/p>\n\n\n\n<p>Ca\u0301ch 1: S\u01b0\u0309 du\u0323ng th\u01b0\u01a1\u0301c \u0111o. T\u00ean tia AB, ta ve\u0303 \u0111i\u00ea\u0309m M sao cho AM = 3cm<\/p>\n\n\n\n<p>Ca\u0301ch 2: G\u00e2\u0301p gi\u00e2\u0301y:<\/p>\n\n\n\n<p>Ve\u0303 \u0111oa\u0323n th\u0103\u0309ng AB tr\u00ean m\u00f4\u0323t t\u01a1\u0300 gi\u00e2\u0301y.<\/p>\n\n\n\n<p>Ta g\u00e2\u0323p \u0111\u00f4i t\u01a1\u0300 gi\u00e2\u0301y sao cho \u0111i\u00ea\u0309m A tru\u0300ng \u0111i\u00ea\u0309m B. N\u00ea\u0301p g\u00e2\u0301p sau g\u00e2\u0323p gi\u00e2\u0301y chi\u0301nh la\u0300 trung \u0111i\u00ea\u0309m M cu\u0309a \u0111oa\u0323n th\u0103\u0309ng AB.<\/p>\n\n\n\n<p>G\u00e2\u0301p gi\u00e2\u0301y xa\u0301c \u0111i\u0323nh trung \u0111i\u00ea\u0309m \u0111oa\u0323n th\u0103\u0309ng<\/p>\n\n\n\n<p>\u0110o\u0323c th\u00eam: Ho\u0323c Toa\u0301n 6 cu\u0300ng Vietlearn: Tra\u0309 l\u01a1\u0300i c\u00e2u ho\u0309i khi na\u0300o AM + MB = AB?<\/p>\n\n\n\n<p>Ba\u0300i t\u00e2\u0323p v\u00e2\u0323n du\u0323ng<\/p>\n\n\n\n<p>Ba\u0300i 1: S\u01b0\u0309 du\u0323ng th\u01b0\u01a1\u0301c \u0111o \u0111\u00f4\u0323 da\u0300i ca\u0301c \u0111oa\u0323n th\u0103\u0309ng AB, BC, AC, CD trong hi\u0300nh ve\u0303 sau. Hoa\u0300n thi\u00ea\u0323n ca\u0301c pha\u0301t bi\u00ea\u0309u sau:<\/p>\n\n\n\n<p>a. \u2026 la\u0300 trung \u0111i\u00ea\u0309m cu\u0309a \u0111oa\u0323n th\u0103\u0309ng BD vi\u0300 \u2026 n\u0103\u0300m gi\u01b0\u0303a va\u0300 ca\u0301ch \u0111\u00ea\u0300u 2 \u0111i\u00ea\u0309m B va\u0300 D.<\/p>\n\n\n\n<p>b. A \u2026 trung \u0111i\u00ea\u0309m cu\u0309a BD vi\u0300 A \u2026 \u0111oa\u0323n th\u0103\u0309ng BD.<\/p>\n\n\n\n<p>c. \u2026 kh\u00f4ng la\u0300 trung \u0111i\u00ea\u0309m cu\u0309a BC vi\u0300 \u2026<\/p>\n\n\n\n<p>Hi\u0300nh ve\u0303<\/p>\n\n\n\n<p>L\u01a1\u0300i gia\u0309i<\/p>\n\n\n\n<p>a. C la\u0300 trung \u0111i\u00ea\u0309m cu\u0309a \u0111oa\u0323n th\u0103\u0309ng BD vi\u0300 C n\u0103\u0300m gi\u01b0\u0303a va\u0300 ca\u0301ch \u0111\u00ea\u0300u 2 \u0111i\u00ea\u0309m B va\u0300 D.<\/p>\n\n\n\n<p>b. A kh\u00f4ng la\u0300 trung \u0111i\u00ea\u0309m cu\u0309a BD vi\u0300 A kh\u00f4ng thu\u00f4\u0323c\/ kh\u00f4ng n\u0103\u0300m tr\u00ean \u0111oa\u0323n th\u0103\u0309ng BD.<\/p>\n\n\n\n<p>c. A\/D kh\u00f4ng la\u0300 trung \u0111i\u00ea\u0309m cu\u0309a BC vi\u0300 kh\u00f4ng n\u0103\u0300m gi\u01b0\u0303a 2 \u0111i\u00ea\u0309m B va\u0300 C.<\/p>\n\n\n\n<p>Ba\u0300i 2: Cho tam gia\u0301c FNO. Ve\u0303 tia Ox \u0111i qua NF. Tr\u00ean Ox l\u00e2\u0301y \u0111i\u00ea\u0309m E sao cho E la\u0300 \u0111i\u00ea\u0309m thu\u00f4\u0323c NF va\u0300 NE &lt; EF. L\u00e2\u0301y M la\u0300 trung \u0111i\u00ea\u0309m cu\u0309a EF. OM vu\u00f4ng go\u0301c v\u01a1\u0301i FN Bi\u00ea\u0301t \u0111\u00f4\u0323 da\u0300i ca\u0301c \u0111oa\u0323n th\u0103\u0309ng: OF = 7cm, FN = 6cm, NE = 2cm, OE = 5cm. Ti\u0301nh di\u00ea\u0323n ti\u0301ch tam gia\u0301c OFM va\u0300 tam gia\u0301c OME<\/p>\n\n\n\n<p>Trung \u0111i\u00ea\u0309m \u0111oa\u0323n th\u0103\u0309ng<\/p>\n\n\n\n<p>Ba\u0300i gia\u0309i:<\/p>\n\n\n\n<p>E thu\u00f4\u0323c NF n\u00ean NE + EF = NF =&gt; EF = NF \u2013 NE = 6 \u2013 2 = 4cm<\/p>\n\n\n\n<p>M la\u0300 trung \u0111i\u00ea\u0309m cu\u0309a EF =&gt; ME = MF = EF\/2 = 4\/2 = 2cm<\/p>\n\n\n\n<p>Di\u00ea\u0323n ti\u0301ch tam gia\u0301c OFM la\u0300: 1\/2 x OF x MF = 1\/2 x 7 x 2 = 7 cm\u00b2<\/p>\n\n\n\n<p>Di\u00ea\u0323n ti\u0301ch tam gia\u0301c OEM la\u0300: 1\/2 x OE x ME = 1\/2 x 5 x 2 = 5 cm\u00b2<\/p>\n\n\n\n<p>Ba\u0300i t\u00e2\u0323p n\u00e2ng cao<\/p>\n\n\n\n<p>Ba\u0300i 3: Cho \u0111\u01b0\u01a1\u0300ng th\u0103\u0300ng AB = 11cm. L\u00e2\u0301y M n\u0103\u0300m gi\u01b0\u0303a A va\u0300 B, MA = 5cm. O la\u0300 trung \u0111i\u00ea\u0309m cu\u0309a MB. Ti\u0301nh OM, OB.<\/p>\n\n\n\n<p>L\u01a1\u0300i gia\u0309i:<\/p>\n\n\n\n<p>MB = AB \u2013 MA = 11 \u2013 5 = 6cm<\/p>\n\n\n\n<p>OM = OB = MB\/2 = 6\/2 = 3cm<\/p>\n\n\n\n<p>Ba\u0300i 4: Ve\u0303 tia Ox trong \u0111o\u0301 OM = 4 cm, ON = 8cm. Tra\u0309 l\u01a1\u0300i ca\u0301c c\u00e2u ho\u0309i sau:<\/p>\n\n\n\n<p>a. M co\u0301 n\u0103\u0300m gi\u01b0\u0303a O va\u0300 N kh\u00f4ng? Gia\u0309i thi\u0301ch.<\/p>\n\n\n\n<p>b. M co\u0301 la\u0300 trung \u0111i\u00ea\u0309m cu\u0309a ON kh\u00f4ng?<\/p>\n\n\n\n<p>L\u01a1\u0300i gia\u0309i<\/p>\n\n\n\n<p>a. Ta co\u0301<\/p>\n\n\n\n<p>M va\u0300 N \u0111\u00ea\u0300u thu\u00f4\u0323c tia Ox.<\/p>\n\n\n\n<p>OM va\u0300 ON \u0111\u00ea\u0300u co\u0301 chung g\u00f4\u0301c O.<\/p>\n\n\n\n<p>ON &gt; OM<\/p>\n\n\n\n<p>=&gt; M co\u0301 n\u0103\u0300m gi\u01b0\u0303a O va\u0300 N.<\/p>\n\n\n\n<p>b. MN = OM \u2013 ON = 8 \u2013 4 = 4cm<\/p>\n\n\n\n<p>Ta co\u0301: OM =MN = 4cm n\u00ean M la\u0300 trung \u0111i\u00ea\u0309m cu\u0309a ON.<\/p>\n\n\n\n<p>Ba\u0300i 5:Ve\u0303 tia Ox. Tr\u00ean Ox ta l\u1ea5y hai \u0111i\u1ec3m C,D trong \u0111o\u0301 OC = 4 cm, OD = 10cm. G\u1ecdi E l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng OD.<\/p>\n\n\n\n<p>a. Ho\u0309i \u0111\u1ed9 d\u00e0i \u0111o\u1ea1n th\u1eb3ng CD la\u0300 bao nhi\u00eau?<\/p>\n\n\n\n<p>b. C co\u0301 n\u0103\u0300m gi\u01b0\u0303a O va\u0300 E kh\u00f4ng?<\/p>\n\n\n\n<p>c. T\u00ednh \u0111\u00f4\u0323 d\u00e0i CE.<\/p>\n\n\n\n<p>B\u00e0i 6: Ve\u0303 tia Oy. Tr\u00ean Oy, ta l\u1ea5y hai \u0111i\u1ec3m A v\u00e0 B trong \u0111o\u0301: OA= 14cm, OB = 16cm. G\u1ecdi M l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng OB.<\/p>\n\n\n\n<p>a) \u0110\u1ed9 d\u00e0i AB la\u0300 bao nhi\u00eau?<\/p>\n\n\n\n<p>b) M co\u0301 n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m O v\u00e0 A hay kh\u00f4ng?<\/p>\n\n\n\n<p>3 bi\u0301 m\u00e2\u0323t phu\u0323 huynh co\u0301 con ho\u0323c l\u01a1\u0301p 6 c\u00e2\u0300n bi\u00ea\u0301t<\/p>\n\n\n\n<p>T\u00e2m ly\u0301 con tre\u0309<\/p>\n\n\n\n<p>Tre\u0309 m\u01a1\u0301i b\u01b0\u01a1\u0301c va\u0300o l\u01a1\u0301p 6 co\u0300n co\u0300n kha\u0301 ham ch\u01a1i, ti\u0301n t\u00e2\u0323p trung co\u0300n th\u00e2\u0301p. \u0110\u0103\u0323c bi\u00ea\u0323t v\u01a1\u0301i d\u01b0 \u00e2m cu\u0309a ky\u0300 nghi\u0309 he\u0300 v\u01b0\u0300a qua con ch\u01b0a th\u01b0\u0323c s\u01b0\u0323 thi\u0301ch thu\u0301 v\u01a1\u0301i vi\u00ea\u0323c ho\u0323c. \u0110\u00f4\u0300ng th\u01a1\u0300i, lu\u0301c na\u0300y be\u0301 v\u01b0\u0300a thay \u0111\u00f4\u0309i m\u00f4i tr\u01b0\u01a1\u0300ng ho\u0323c t\u00e2\u0323p t\u01b0\u0300 c\u00e2\u0301p 1 l\u00ean c\u00e2\u0301p 2. Kha\u0301c v\u01a1\u0301i m\u00f4i tr\u01b0\u01a1\u0300ng c\u00e2\u0301p 1, th\u00e2\u0300y c\u00f4 lu\u00f4n ke\u0300m c\u0103\u0323p, sa\u0301t sao chi\u0309 \u0111i\u0301ch danh, chi ti\u00ea\u0301t vi\u00ea\u0323c c\u00e2\u0300n la\u0300m cho con. Khi ho\u0323c c\u00e2\u0301p 2, th\u00e2\u0300y c\u00f4 chi\u0309 la\u0300 ng\u01b0\u01a1\u0300i \u0111i\u0323nh h\u01b0\u01a1\u0301ng va\u0300 y\u00eau c\u00e2\u0300u kha\u0309 n\u0103ng t\u01b0\u0323 ho\u0323c, t\u01b0\u0323 gia\u0301c cu\u0309a con cao h\u01a1n. Trong th\u01a1\u0300i gian na\u0300y, b\u00f4\u0301 me\u0323 c\u00e2\u0300n la\u0300m c\u00f4ng ta\u0301c t\u01b0 t\u01b0\u01a1\u0309ng cho con. \u0110\u00ea\u0309 con kh\u00f4ng bi\u0323 b\u01a1\u0303 ng\u01a1\u0303 khi thay \u0111\u00f4\u0309i m\u00f4i tr\u01b0\u01a1\u0300ng ho\u0323c t\u00e2\u0323p. B\u00f4\u0301 me\u0323 cu\u0303ng c\u00e2\u0300n re\u0300n luy\u00ea\u0323n trang bi\u0323 cho con ca\u0301c ky\u0303 n\u0103ng: t\u01b0\u0323 ho\u0323c, l\u0103\u0301ng nghe, ghi che\u0301p,\u2026 \u0111\u00ea\u0309 con co\u0301 th\u00ea\u0309 thi\u0301ch \u01b0\u0301ng nhanh v\u01a1\u0301i m\u00f4i tr\u01b0\u01a1\u0300ng ho\u0323c t\u00e2\u0323p m\u01a1\u0301i.<\/p>\n\n\n\n<p>Ti\u0300m hi\u00ea\u0309u s\u01a1\u0309 thi\u0301ch<\/p>\n\n\n\n<p>Vi\u00ea\u0323c ti\u0300m hi\u00ea\u0309u s\u01a1\u0309 thi\u0301ch cu\u0309a con b\u00f4\u0301 me\u0323 c\u00e2\u0300n la\u0300m ca\u0300ng s\u01a1\u0301m ca\u0300ng t\u00f4\u0301t. D\u01b0\u0323a theo s\u01a1\u0309 thi\u0301ch, kha\u0309 n\u0103ng b\u00f4\u0301 me\u0323 co\u0301 \u0111i\u0323nh h\u01b0\u01a1\u0301ng phu\u0300 h\u01a1\u0323p cho con. Vi\u00ea\u0323c \u0111i\u0323nh h\u01b0\u01a1\u0301ng s\u01a1\u0301m la\u0300 r\u00e2\u0301t t\u00f4\u0301t. Tuy nhi\u00ean, b\u00f4\u0301 me\u0323 c\u00e2\u0300n t\u00f4n tro\u0323ng s\u01a1\u0309 thi\u0301ch cu\u0309a tre\u0309. M\u00f4\u0323t va\u0300i be\u0301 co\u0301 n\u0103ng khi\u00ea\u0301u va\u0300 s\u01a1\u0309 thi\u0301ch v\u00ea\u0300 ngh\u00ea\u0323 thu\u00e2\u0323t tuy nhi\u00ean kh\u00f4ng nh\u00e2\u0323n \u0111\u01b0\u01a1\u0323c s\u01b0\u0323 u\u0309ng h\u00f4\u0323 t\u01b0\u0300 b\u00f4\u0301 me\u0323 va\u0300 gia \u0111i\u0300nh. Vietlearn khuy\u00ean r\u0103\u0300ng vi\u00ea\u0323c \u0111\u00ea\u0309 be\u0301 pha\u0301t tri\u00ea\u0309n theo \u0111u\u0301ng s\u01a1\u0309 thi\u0301ch kha\u0309 n\u0103ng cu\u0309a con se\u0303 t\u00f4\u0301t h\u01a1n r\u00e2\u0301t nhi\u00ea\u0300u. Chu\u0301ng ta ha\u0303y \u0111i\u0323nh h\u01b0\u01a1\u0301ng cho con \u0111i \u0111u\u0301ng tr\u00ean c\u01a1 s\u01a1\u0309 d\u01a1\u0309 thi\u0301ch cu\u0309a con. Con se\u0303 kh\u00f4ng ca\u0309m th\u00e2\u0301y cha\u0301n na\u0309n trong ho\u0323c t\u00e2\u0323p. B\u00f4\u0301 me\u0323 kh\u00f4ng pha\u0309i \u0111au \u0111\u00e2\u0300u ti\u0300m ca\u0301ch \u0111\u00f4\u0301i pho\u0301 v\u01a1\u0301i be\u0301.<\/p>\n\n\n\n<p>Tre\u0309 mu\u00f4\u0301n \u0111\u01b0\u01a1\u0323c t\u00f4n tro\u0323ng<\/p>\n\n\n\n<p>Tre\u0309 \u01a1\u0309 \u0111\u00f4\u0323 tu\u00f4\u0309i na\u0300y \u0111\u0103\u0323c bi\u00ea\u0323t r\u00e2\u0301t mu\u00f4\u0301n kh\u0103\u0309ng \u0111i\u0323nh ba\u0309n th\u00e2n. B\u00f4\u0301 me\u0323 n\u00ean l\u0103\u0301ng nghe va\u0300 t\u00f4n tro\u0323ng y\u0301 ki\u00ea\u0301n cu\u0309a con. Vi\u00ea\u0323c ga\u0323t ph\u0103ng va\u0300 cho r\u0103\u0300ng con kh\u00f4ng bi\u00ea\u0301t gi\u0300 hay con co\u0300n nho\u0309 se\u0303 khi\u00ea\u0301n ca\u0301c be\u0301 bi\u0323 t\u00f4\u0309n th\u01b0\u01a1ng t\u00e2m ly\u0301. D\u00e2\u0300n be\u0301 se\u0303 hi\u0300nh tha\u0300nh t\u00e2m ly\u0301 t\u01b0\u0323 ti, thu mi\u0300nh la\u0323i. \u0110\u00f4\u0301i v\u01a1\u0301i m\u00f4\u0323t s\u00f4\u0301 tre\u0309 vi\u00ea\u0323c kh\u0103\u0309ng \u0111i\u0323nh ca\u0301i t\u00f4i se\u0303 d\u01b0\u0303 d\u00f4\u0323i h\u01a1n. Ti\u0301nh ca\u0301ch cu\u0309a con hi\u0300nh tha\u0300nh th\u00f4ng qua ca\u0301c gia\u0301o du\u0323c, giao ti\u00ea\u0301p v\u01a1\u0301i b\u00f4\u0301 me\u0323. B\u00f4\u0301 me\u0323 ha\u0303y tr\u01a1\u0309 tha\u0300nh nh\u01b0\u0303ng ng\u01b0\u01a1\u0300i ba\u0323n t\u00f4n tro\u0323ng va\u0300 chia se\u0309 cu\u0300ng con. Be\u0301 ca\u0309m th\u00e2\u0301y ba\u0309n th\u00e2n \u0111\u01b0\u01a1\u0323c t\u00f4n tro\u0323ng be\u0301. Be\u0301 cu\u0303ng se\u0303 bi\u00ea\u0301t ca\u0301ch t\u00f4n tro\u0323ng ng\u01b0\u01a1\u0300i kha\u0301c.<\/p>\n\n\n\n<p>L\u01a1\u0300i k\u00ea\u0301t<\/p>\n\n\n\n<p>Vietlearn hy vo\u0323ng v\u01a1\u0301i ba\u0300i vi\u00ea\u0301t tr\u00ean \u0111a\u0303 giu\u0301p ca\u0301c ba\u0323n ho\u0323c sinh co\u0301 \u0111\u00e2\u0300y \u0111u\u0309 ca\u0301c ki\u00ea\u0301n th\u01b0\u0301c v\u00ea\u0300 trung \u0111i\u00ea\u0309m \u0111oa\u0323n th\u0103\u0309ng. Ghe\u0301 qua blog Vietlearn \u0111\u00ea\u0309 ti\u0300m hi\u00ea\u0309u th\u00eam ca\u0301c ki\u00ea\u0301n th\u01b0\u0301c va\u0300 da\u0323ng ba\u0300i t\u00e2\u0323p m\u01a1\u0301i.<\/p>\n\n\n\n<p>Kho t\u00e0i li\u1ec7u <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc t\u1eadp<\/a> Mi\u1ec5n Ph\u00ed \u2013 Vietlearn<\/p>\n\n\n\n<p>Vietlearn <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">gia s\u01b0<\/a> tr\u01b0\u0323c tuy\u00ea\u0301n ha\u0300ng \u0111\u00e2\u0300u Vi\u00ea\u0323t Nam. V\u01a1\u0301i kho\u0301a ho\u0323c K12 ca\u0301c m\u00f4n: Toa\u0301n, Ly\u0301, Ho\u0301a,\u2026 da\u0300nh cho ca\u0301c l\u01a1\u0301p t\u01b0\u0300 1 \u0111\u00ea\u0301n l\u01a1\u0301p 12. Ca\u0301c kho\u0301a ho\u0323c \u0111\u01b0\u01a1\u0323c thi\u00ea\u0301t k\u00ea\u0301 tr\u01b0\u0323c quan, sinh \u0111\u00f4\u0323ng. Ba\u0323n mu\u00f4\u0301n cu\u0309ng c\u00f4\u0301 ca\u0301c ki\u00ea\u0301n th\u01b0\u0301c c\u01a1 ba\u0309n? Ba\u0323n mu\u00f4\u0301n ho\u0323c ca\u0301c ki\u00ea\u0301n th\u01b0\u0301c Toa\u0301n n\u00e2ng cao? Vietlearn la\u0300 l\u01b0\u0323a cho\u0323n phu\u0300 h\u01a1\u0323p cho ca\u0301c ba\u0323n ho\u0323c sinh. \u0110\u00ea\u0301n v\u01a1\u0301i Vietlearn, ba\u0323n se\u0303 \u0111\u01b0\u01a1\u0323c thi\u00ea\u0301t k\u00ea\u0301 ri\u00eang m\u00f4\u0323t l\u00f4\u0323 tri\u0300nh ho\u0323c d\u01b0\u0323a tr\u00ean kha\u0309 n\u0103ng, k\u00ea\u0301t qua\u0309 ho\u0323c t\u00e2\u0323p. Vietlearn t\u01b0\u0323 tin giu\u0301p ba\u0323n ho\u0323c t\u00f4\u0301t m\u00f4n Toa\u0301n. Truy c\u00e2\u0323p Vietlearn.org\/<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>Ca\u0301ch \u0111o va\u0300 so sa\u0301nh \u0111\u00f4\u0323 da\u0300i \u0111oa\u0323n th\u0103\u0309ng \u2013 H\u1ecd<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn \u01a0\u0309 ca\u0301c ba\u0300i vi\u00ea\u0301t tr\u01b0\u01a1\u0301c, chu\u0301ng ta \u0111a\u0303 ti\u0300m hi\u00ea\u0309u v\u00ea\u0300 ca\u0301c ki\u00ea\u0301n th\u01b0\u0301c v\u00ea\u0300 tia, \u0111oa\u0323n th\u0103\u0309ng, ca\u0301ch so sa\u0301nh \u0111\u00f4\u0323 da\u0300i \u0111oa\u0323n th\u0103\u0309ng. Trong ba\u0300i vi\u00ea\u0301t na\u0300y, chu\u0301ng ta se\u0303 ti\u0300m hi\u00ea\u0309u v\u00ea\u0300 trung \u0111i\u00ea\u0309m cu\u0309a \u0111oa\u0323n th\u0103\u0309ng. Th\u00ea\u0301 na\u0300o la\u0300 trung \u0111i\u00ea\u0309m? Ca\u0301ch ti\u0300m trung \u0111i\u00ea\u0309m [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[9,4],"tags":[],"class_list":["post-2655","post","type-post","status-publish","format-standard","hentry","category-toan-hoc","category-trung-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/2655","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=2655"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/2655\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=2655"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=2655"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=2655"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}