Đề kiểm tra 1 tiết Chương 3 Hình học 10 Trường THP...

A. \({b^2} = {a^2} + {c^2} - 2ac\cos B\)

B. \({a^2} = {b^2} + {c^2} - 2bc\cos A\)

C. \({c^2} = {b^2} + {a^2} + 2ab\cos C\)

D. \({c^2} = {b^2} + {a^2} - 2ab\cos C\)

A. \(R = \frac{a}{{\sin A}}\)

B. \(R = \frac{b}{{\sin A}}\)

C. \(R = \frac{a}{{2\sin A}}\)

D. \(R = \frac{b}{{2\sin A}}\)

A. \(m_a^2 = \frac{{{b^2} + {c^2}}}{2} + \frac{{{a^2}}}{4}\)

B. \(m_a^2 = \frac{{{a^2} + {c^2}}}{2} - \frac{{{b^2}}}{4}\)

C. \(m_a^2 = \frac{{2{c^2} + 2{b^2} - {a^2}}}{4}\)

D. \(m_a^2 = \frac{{{a^2} + {b^2}}}{2} - \frac{{{c^2}}}{4}\)

A. \(S = \sqrt {p\left( {p - a} \right)\left( {p - b} \right)\left( {p - c} \right)} \)

B. \(S = \sqrt {\left( {p - a} \right)\left( {p - b} \right)\left( {p - c} \right)} \)

C. \(S = p\left( {p - a} \right)\left( {p - b} \right)\left( {p - c} \right)\)

D. \(S = \left( {p - a} \right)\left( {p - b} \right)\left( {p - c} \right)\)

A. \(\cos A = \frac{{{b^2} + {c^2} - {a^2}}}{{bc}}\)

B. \(\cos A = \frac{{{b^2} + {c^2} - {a^2}}}{{2bc}}\)

C. \(\cos A = \frac{{{a^2} + {b^2} + {c^2}}}{{bc}}\)

D. \(\cos A = \frac{{{a^2} + {b^2} + {c^2}}}{{2bc}}\)

A. \(\overrightarrow n  = \left( {1;3} \right)\)

B. \(\overrightarrow n  = \left( { - 3;1} \right)\)

C. \(\overrightarrow n  = \left( {1; - 3} \right)\)

D. \(\overrightarrow n  = \left( {3;1} \right)\)

A. \(M\left( {1; - 2} \right)\)

B. \(N\left( {3;5} \right)\)

C. \(P\left( { - 1; - 2} \right)\)

D. \(Q\left( { - 3;5} \right)\)

A. \(\overrightarrow u  = \left( {1; - 3} \right)\)

B. \(\overrightarrow u  = \left( { - 2;3} \right)\)

C. \(\overrightarrow u  = \left( { - 1;3} \right)\)

D. \(\overrightarrow u  = \left( { - 2; - 3} \right)\)

A. 49

B. \(\sqrt {97} \)

C. 7

D. \(\sqrt {61} \)

A. \(\sqrt 2 \)

B. \(2\sqrt 2 \)

C. \(\sqrt 3 \)

D. \(2\sqrt 3 \)

A. 60

B. \(60\sqrt 3 \)

C. 30

D. \(30\sqrt 3 \)

A. \(\left\{ {\begin{array}{*{20}{c}}{x = t}\\{y = 2 + t}\end{array}\,\,\left( {t \in R} \right)} \right.\)

B. \(\left\{ {\begin{array}{*{20}{c}}{x = 2}\\{y = t}\end{array}\,\,\left( {t \in R} \right)} \right.\)

C. \(\left\{ {\begin{array}{*{20}{c}}{x = 3 + t}\\{y = 1 + t}\end{array}\,\,\left( {t \in R} \right)} \right.\)

D. \(\left\{ {\begin{array}{*{20}{c}}{x = t}\\{y = 3 - t}\end{array}\,\,\left( {t \in R} \right)} \right.\)

A. Song song 

B. Cắt nhau 

C. Vuông góc 

D. Trùng nhau 

A. \(\frac{5}{{\sqrt {13} }}\)

B. \(\frac{7}{{\sqrt {13} }}\)

C. \(\frac{12}{{\sqrt {13} }}\)

D. \(\frac{15}{{\sqrt {13} }}\)

A. \(1 + \sqrt 2 \)

B. \(\frac{{2 + \sqrt 2 }}{2}\)

C. \(\frac{{\sqrt 2  - 1}}{2}\)

D. \(\frac{{\sqrt 2  + 1}}{2}\)

A. \(\frac{{a\sqrt 3 }}{2}\)

B. \(\frac{{a\sqrt 3 }}{3}\)

C. \(\frac{{a\sqrt 2 }}{2}\)

D. \(\frac{{a\sqrt 2 }}{3}\)

A. \(4x + 2y + 3 = 0\)

B. \(4x + 2y - 3 = 0\)

C. \(4x + 2y - 8 = 0\)

D. \(4x + 2y + 8 = 0\)

A. \(\frac{1}{{\sqrt {17} }}\)

B. \(\frac{2}{{\sqrt {17} }}\)

C. \(-\frac{1}{{\sqrt {17} }}\)

D. \(-\frac{2}{{\sqrt {17} }}\)

A. \(\frac{{49}}{2}\)

B. 49

C. 10

D. 5

A. \(7x - y + 1 = 0\)

B. \(x - 7y + 1 = 0\)

C. \(x + 7y + 1 = 0\)

D. \(7x + y + 1 = 0\)