TEST 1
1.
\(m\left(\widehat{BAC}\right)=70^\circ\)
\(m\left(\widehat{ABC}\right)=50^\circ\)
\(\Rightarrow m\left(\widehat{ACB}\right)=\alpha=?\)
A) \(40\)B) \(50\)C) \(60\)D) \(70\)E) \(80\)
2.
\(m\left(\widehat{ABC}\right)=75^\circ\)
\(m\left(\widehat{ACB}\right)=63^\circ\)
\(\Rightarrow m\left(\widehat{BAC}\right)=\alpha=?\)
A) \(32\)B) \(42\)C) \(48\)D) \(52\)E) \(58\)
3.
\(m\left(\widehat{DAC}\right)=118^\circ\)
\(m\left(\widehat{DBC}\right)=81^\circ\)
\(\Rightarrow m\left(\widehat{ACB}\right)=\alpha=?\)
A) \(37\)B) \(43\)C) \(47\)D) \(53\)E) \(57\)
4.
\(m\left(\widehat{DAB}\right)=100^\circ\)
\(m\left(\widehat{DCB}\right)=40^\circ\)
\(m\left(\widehat{EFB}\right)=70^\circ\)
\(\Rightarrow m\left(\widehat{BEF}\right)=\alpha=?\)
A) \(35\)B) \(40\)C) \(45\)D) \(50\)E) \(60\)
5.
\(\lvert AB\rvert=\lvert AC\rvert\)
\(m\left(\widehat{ABC}\right)=85^\circ\)
\(\Rightarrow m\left(\widehat{BAC}\right)=\alpha=?\)
A) \(10\)B) \(20\)C) \(30\)D) \(75\)E) \(85\)
6.
\(m\left(\widehat{ACB}\right)=30^\circ\)
\(\lvert AC\rvert=\lvert BC\rvert\)
\(\Rightarrow m\left(\widehat{BAC}\right)=\alpha=?\)
A) \(30\)B) \(45\)C) \(65\)D) \(75\)E) \(85\)
7.
\(m\left(\widehat{BAC}\right)=20^\circ\)
\(m\left(\widehat{DBC}\right)=40^\circ\)
\([AC]\perp[BC]\)
\(\Rightarrow m\left(\widehat{ABD}\right)=\alpha=?\)
A) \(20\)B) \(30\)C) \(40\)D) \(45\)E) \(55\)
8.
\(m\left(\widehat{ABE}\right)=30^\circ\)
\(m\left(\widehat{ACB}\right)=40^\circ\)
\([BE]\perp[AC]\)
\([AF]\perp[BC]\)
\(\Rightarrow m\left(\widehat{BAF}\right)=\alpha=?\)
A) \(10\)B) \(20\)C) \(30\)D) \(40\)E) \(50\)