Bài tập nâng cao bài Góc. Số đo góc

Home Lớp 6 Toán lớp 6 sách cũ Góc. Số đo góc

{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":10,"ques":" V\u1ebd ba \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ed3ng quy t\u1ea1i S. S\u1ed1 g\u00f3c t\u1ea1o th\u00e0nh l\u00e0:","select":["A. 6 g\u00f3c","B. 9 g\u00f3c","C. 12 g\u00f3c","D. 15 g\u00f3c"],"hint":"","explain":" B\u00e0i gi\u1ea3i:<\/span><br\/><center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai11/lv3/img\/H622_K101.png' \/><\/center>Ta c\u00f3: S\u1ed1 tia chung g\u1ed1c S l\u00e0: 2 . 3 = 6 (tia) <br\/>S\u1ed1 g\u00f3c t\u1ea1o th\u00e0nh l\u00e0: $\\dfrac{6 . 5}{2}$ = 15 (g\u00f3c)<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0:D. 15 g\u00f3c<\/span><\/span> <br\/><\/span>Nh\u1eadn x\u00e9t:<\/span><br\/>+ Cho n tia chung g\u1ed1c, m\u1ed7i tia t\u1ea1o v\u1edbi n - 1 tia c\u00f2n l\u1ea1i th\u00e0nh n - 1 g\u00f3c. C\u00f3 n tia n\u00ean t\u1ea1o \u0111\u01b0\u1ee3c n.(n - 1) g\u00f3c. Nh\u01b0ng m\u1ed7i g\u00f3c \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00ednh hai l\u1ea7n, do \u0111\u00f3 t\u1ea5t c\u1ea3 ch\u1ec9 c\u00f3: $\\dfrac{n . (n - 1)}{2}$ g\u00f3c<br\/> V\u1eady g\u1ecdi n l\u00e0 s\u1ed1 tia chung g\u1ed1c, khi \u0111\u00f3 s\u1ed1 g\u00f3c do n tia n\u00e0y t\u1ea1o ra \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c: $\\dfrac{n . (n - 1)}{2}$<\/b><\/span>","column":2}]}],"id_ques":2131},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":10,"ques":" Cho 4 tia chung g\u1ed1c. S\u1ed1 g\u00f3c t\u1ea1o th\u00e0nh l\u00e0:","select":["A. 6 g\u00f3c","B. 9 g\u00f3c","C. 12 g\u00f3c","D. 15 g\u00f3c"],"hint":"","explain":" B\u00e0i gi\u1ea3i:<\/span><br\/><center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai11/lv3/img\/H622_K102.png' \/><\/center>Ta c\u00f3: <br\/>S\u1ed1 g\u00f3c t\u1ea1o th\u00e0nh l\u00e0: $\\dfrac{4 . 3}{2}$ = 6 (g\u00f3c)<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0:A. 6 g\u00f3c<\/span><\/span> <br\/><\/span>Nh\u1eadn x\u00e9t:<\/span><br\/>+ Cho n tia chung g\u1ed1c, m\u1ed7i tia t\u1ea1o v\u1edbi n - 1 tia c\u00f2n l\u1ea1i th\u00e0nh n - 1 g\u00f3c. C\u00f3 n tia n\u00ean t\u1ea1o \u0111\u01b0\u1ee3c n.(n - 1) g\u00f3c. Nh\u01b0ng m\u1ed7i g\u00f3c \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00ednh hai l\u1ea7n, do \u0111\u00f3 t\u1ea5t c\u1ea3 ch\u1ec9 c\u00f3: $\\dfrac{n . (n - 1)}{2}$ g\u00f3c<br\/> V\u1eady g\u1ecdi n l\u00e0 s\u1ed1 tia chung g\u1ed1c, khi \u0111\u00f3 s\u1ed1 g\u00f3c do n tia n\u00e0y t\u1ea1o ra \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c: $\\dfrac{n . (n - 1)}{2}$<\/b><\/span>","column":2}]}],"id_ques":2132},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":10,"ques":" Cho 10 tia chung g\u1ed1c. S\u1ed1 g\u00f3c t\u1ea1o th\u00e0nh l\u00e0:","select":["A. 42 g\u00f3c","B. 45 g\u00f3c","C. 48 g\u00f3c","D. 50 g\u00f3c"],"hint":"","explain":" B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: <br\/>S\u1ed1 g\u00f3c t\u1ea1o th\u00e0nh l\u00e0: $\\dfrac{10. (10 - 1)}{2}$ = 45 (g\u00f3c)<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0:B. 45 g\u00f3c<\/span><\/span> <br\/><\/span>Nh\u1eadn x\u00e9t:<\/span><br\/>+ Cho n tia chung g\u1ed1c, m\u1ed7i tia t\u1ea1o v\u1edbi n - 1 tia c\u00f2n l\u1ea1i th\u00e0nh n - 1 g\u00f3c. C\u00f3 n tia n\u00ean t\u1ea1o \u0111\u01b0\u1ee3c n.(n - 1) g\u00f3c. Nh\u01b0ng m\u1ed7i g\u00f3c \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00ednh hai l\u1ea7n, do \u0111\u00f3 t\u1ea5t c\u1ea3 ch\u1ec9 c\u00f3: $\\dfrac{n . (n - 1)}{2}$ g\u00f3c<br\/> V\u1eady g\u1ecdi n l\u00e0 s\u1ed1 tia chung g\u1ed1c, khi \u0111\u00f3 s\u1ed1 g\u00f3c do n tia n\u00e0y t\u1ea1o ra \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c: $\\dfrac{n . (n - 1)}{2}$<\/b><\/span>","column":2}]}],"id_ques":2133},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":10,"ques":" V\u1ebd n\u0103m \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ed3ng quy t\u1ea1i S. S\u1ed1 g\u00f3c t\u1ea1o th\u00e0nh l\u00e0:","select":["A. 25 g\u00f3c","B. 28 g\u00f3c","C. 42 g\u00f3c","D. 45 g\u00f3c"],"hint":"","explain":" B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: S\u1ed1 tia chung g\u1ed1c S l\u00e0: 2 . 5 = 10 (tia) <br\/>S\u1ed1 g\u00f3c t\u1ea1o th\u00e0nh l\u00e0: $\\dfrac{10 . (10 - 1)}{2}$ = 45 (g\u00f3c)<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0:D. 45 g\u00f3c<\/span><\/span> <br\/><\/span>Nh\u1eadn x\u00e9t:<\/span><br\/>+ Cho n tia chung g\u1ed1c, m\u1ed7i tia t\u1ea1o v\u1edbi n - 1 tia c\u00f2n l\u1ea1i th\u00e0nh n - 1 g\u00f3c. C\u00f3 n tia n\u00ean t\u1ea1o \u0111\u01b0\u1ee3c n.(n - 1) g\u00f3c. Nh\u01b0ng m\u1ed7i g\u00f3c \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00ednh hai l\u1ea7n, do \u0111\u00f3 t\u1ea5t c\u1ea3 ch\u1ec9 c\u00f3: $\\dfrac{n . (n - 1)}{2}$ g\u00f3c<br\/> V\u1eady g\u1ecdi n l\u00e0 s\u1ed1 tia chung g\u1ed1c, khi \u0111\u00f3 s\u1ed1 g\u00f3c do n tia n\u00e0y t\u1ea1o ra \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c: $\\dfrac{n . (n - 1)}{2}$<\/b><\/span>","column":2}]}],"id_ques":2134},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":10,"ques":" V\u1ebd t\u00e1m \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ed3ng quy t\u1ea1i S. S\u1ed1 g\u00f3c t\u1ea1o th\u00e0nh l\u00e0:","select":["A. 110 g\u00f3c","B. 115 g\u00f3c","C. 120 g\u00f3c","D. 125 g\u00f3c"],"hint":"","explain":" B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: S\u1ed1 tia chung g\u1ed1c S l\u00e0: 2 . 8 = 16 (tia) <br\/>S\u1ed1 g\u00f3c t\u1ea1o th\u00e0nh l\u00e0: $\\dfrac{16 . (16 - 1)}{2}$ = 120 (g\u00f3c)<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C. 120 g\u00f3c<\/span><\/span> <br\/><\/span>Nh\u1eadn x\u00e9t:<\/span><br\/>+ Cho n tia chung g\u1ed1c, m\u1ed7i tia t\u1ea1o v\u1edbi n - 1 tia c\u00f2n l\u1ea1i th\u00e0nh n - 1 g\u00f3c. C\u00f3 n tia n\u00ean t\u1ea1o \u0111\u01b0\u1ee3c n.(n - 1) g\u00f3c. Nh\u01b0ng m\u1ed7i g\u00f3c \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00ednh hai l\u1ea7n, do \u0111\u00f3 t\u1ea5t c\u1ea3 ch\u1ec9 c\u00f3: $\\dfrac{n . (n - 1)}{2}$ g\u00f3c<br\/> V\u1eady g\u1ecdi n l\u00e0 s\u1ed1 tia chung g\u1ed1c, khi \u0111\u00f3 s\u1ed1 g\u00f3c do n tia n\u00e0y t\u1ea1o ra \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c: $\\dfrac{n . (n - 1)}{2}$<\/b><\/span>","column":2}]}],"id_ques":2135},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["95"],["45"]]],"list":[{"point":10,"width":50,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai11/lv3/img\/H622_K103.png' \/><\/center> G\u00f3c AOC c\u00f3 s\u1ed1 \u0111o l\u00e0: _input_$^o$, g\u00f3c BOC c\u00f3 s\u1ed1 \u0111o g\u00f3c l\u00e0: _input_$^o$","hint":"G\u1ee3i \u00fd","explain":"B\u00e0i gi\u1ea3i:<\/span><br\/>Quan s\u00e1t h\u00ecnh v\u1ebd ta th\u1ea5y:<br\/>+ Tia OC \u0111i qua v\u1ea1ch 0<br\/>+ Tia OB \u0111i qua v\u1ea1ch 45<br\/>V\u1eady g\u00f3c BOC c\u00f3 s\u1ed1 \u0111o l\u00e0: $45^o$<br\/>+ Tia OC \u0111i qua v\u1ea1ch 0<br\/>+ Tia OA \u0111i qua v\u1ea1ch 95<br\/>V\u1eady g\u00f3c AOC c\u00f3 s\u1ed1 \u0111o l\u00e0: $95^o$<br\/> C\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t t\u1eeb tr\u00e1i qua ph\u1ea3i l\u00e0: $95^o$, $45^o$<\/span><\/span> <br\/>"}]}],"id_ques":2136},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["55"],["70"]]],"list":[{"point":10,"width":50,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai11/lv3/img\/H622_K104.png' \/><\/center> G\u00f3c ASB c\u00f3 s\u1ed1 \u0111o l\u00e0: _input_$^o$, g\u00f3c ASC c\u00f3 s\u1ed1 \u0111o g\u00f3c l\u00e0: _input_$^o$","hint":"G\u1ee3i \u00fd","explain":"B\u00e0i gi\u1ea3i:<\/span><br\/>Quan s\u00e1t h\u00ecnh v\u1ebd ta th\u1ea5y:<br\/>+ Tia SA \u0111i qua v\u1ea1ch 0<br\/>+ Tia SB \u0111i qua v\u1ea1ch 55<br\/>V\u1eady g\u00f3c ASB c\u00f3 s\u1ed1 \u0111o l\u00e0: $55^o$<br\/>+ Tia SA \u0111i qua v\u1ea1ch 0<br\/>+ Tia SC \u0111i qua v\u1ea1ch 70<br\/>V\u1eady g\u00f3c ASC c\u00f3 s\u1ed1 \u0111o l\u00e0: $70^o$<br\/> C\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t t\u1eeb tr\u00e1i qua ph\u1ea3i l\u00e0: $55^o$, $70^o$<\/span><\/span> <br\/>"}]}],"id_ques":2137},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n sai","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":10,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai11/lv3/img\/H622_K104.png' \/><\/center> Cho h\u00ecnh v\u1ebd nh\u01b0 tr\u00ean. G\u00f3c ASC \u0111\u01b0\u1ee3c t\u1ea1o b\u1edfi hai c\u1ea1nh n\u00e0o?","select":["A. AS v\u00e0 CA","B. CS v\u00e0 AC","C. SA v\u00e0 SC","D. T\u1ea5t c\u1ea3 c\u00e1c \u0111\u00e1p \u00e1n tr\u00ean \u0111\u1ec1u \u0111\u00fang"],"hint":"","explain":" H\u01b0\u1edbng d\u1eabn:<\/span><br\/> G\u00f3c l\u00e0 h\u00ecnh g\u1ed3m hai tia chung g\u1ed1c. G\u1ed1c chung c\u1ee7a hai tia l\u00e0 \u0111\u1ec9nh c\u1ee7a g\u00f3c. Hai tia l\u00e0 hai c\u1ea1nh c\u1ee7a g\u00f3c<\/span> <br\/>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: <br\/>G\u00f3c ASC c\u00f3 hai c\u1ea1nh: SA v\u00e0 SC<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n: C. SA v\u00e0 SC<\/span><\/span> <br\/><\/span>Nh\u1eadn x\u00e9t:<\/span> Khi \u0111\u1ecdc (hay vi\u1ebft) t\u00ean m\u1ed9t tia, ph\u1ea3i \u0111\u1ecdc (hay vi\u1ebft) t\u00ean g\u1ed1c tr\u01b0\u1edbc.<\/span>","column":2}]}],"id_ques":2138},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n sai","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":10,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai11/lv3/img\/H622_K106.png' \/><\/center> Cho h\u00ecnh v\u1ebd nh\u01b0 tr\u00ean. G\u00f3c BOC \u0111\u01b0\u1ee3c t\u1ea1o b\u1edfi hai c\u1ea1nh n\u00e0o?","select":["A. OA v\u00e0 OC","B. OB v\u00e0 OC","C. BC v\u00e0 OC","D. T\u1ea5t c\u1ea3 c\u00e1c \u0111\u00e1p \u00e1n tr\u00ean \u0111\u1ec1u \u0111\u00fang"],"hint":"","explain":" H\u01b0\u1edbng d\u1eabn:<\/span><br\/> G\u00f3c l\u00e0 h\u00ecnh g\u1ed3m hai tia chung g\u1ed1c. G\u1ed1c chung c\u1ee7a hai tia l\u00e0 \u0111\u1ec9nh c\u1ee7a g\u00f3c. Hai tia l\u00e0 hai c\u1ea1nh c\u1ee7a g\u00f3c<\/span> <br\/>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: <br\/>G\u00f3c BOC c\u00f3 hai c\u1ea1nh: OB v\u00e0 OC<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n: B. OB v\u00e0 OC<\/span><\/span> <br\/><\/span>Nh\u1eadn x\u00e9t:<\/span> Khi \u0111\u1ecdc (hay vi\u1ebft) t\u00ean m\u1ed9t tia, ph\u1ea3i \u0111\u1ecdc (hay vi\u1ebft) t\u00ean g\u1ed1c tr\u01b0\u1edbc.<\/span>","column":2}]}],"id_ques":2139},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n sai","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":10,"ques":"G\u00f3c AMB \u0111\u01b0\u1ee3c t\u1ea1o b\u1edfi hai c\u1ea1nh n\u00e0o?","select":["A. MB v\u00e0 MA","B. MB v\u00e0 MC","C. BC v\u00e0 MC","D. T\u1ea5t c\u1ea3 c\u00e1c \u0111\u00e1p \u00e1n tr\u00ean \u0111\u1ec1u \u0111\u00fang"],"hint":"","explain":" H\u01b0\u1edbng d\u1eabn:<\/span><br\/> G\u00f3c l\u00e0 h\u00ecnh g\u1ed3m hai tia chung g\u1ed1c. G\u1ed1c chung c\u1ee7a hai tia l\u00e0 \u0111\u1ec9nh c\u1ee7a g\u00f3c. Hai tia l\u00e0 hai c\u1ea1nh c\u1ee7a g\u00f3c<\/span> <br\/>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: <br\/>G\u00f3c AMB c\u00f3 hai c\u1ea1nh: MB v\u00e0 MA<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n: A. MB v\u00e0 MA<\/span><\/span> <br\/><\/span>Nh\u1eadn x\u00e9t:<\/span> Khi \u0111\u1ecdc (hay vi\u1ebft) t\u00ean m\u1ed9t tia, ph\u1ea3i \u0111\u1ecdc (hay vi\u1ebft) t\u00ean g\u1ed1c tr\u01b0\u1edbc.<\/span>","column":2}]}],"id_ques":2140}],"lesson":{"save":0,"level":3}}

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