# Test: Angles, Straight Lines - Challenging

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Question 1:   Find an angle corresponding to $\frac{15}{11}$ revolution
${490.91}^{\circ }$
${151}^{\circ }$
${245.45}^{\circ }$
${409.09}^{\circ }$
Question 2:   Find the angle $\alpha$:
$\sphericalangle \alpha =45°$
$\sphericalangle \alpha =60°$
$\sphericalangle \alpha =70°$
$\sphericalangle \alpha =80°$
Question 3:   One of the angles in a triangle equals to an arithmetic mean of all the angles of that triangle. What is the measure of that angle?
${60}^{\circ }$
${90}^{\circ }$
${45}^{\circ }$
${30}^{\circ }$
Question 4:   Find the angle $\alpha$ , when $p\parallel q$:

${30}^{\circ }$
${60}^{\circ }$
${50}^{\circ }$
${40}^{\circ }$
Question 5:   Find the angle $\alpha$ :

${70}^{\circ }$
${80}^{\circ }$
${90}^{\circ }$
${100}^{\circ }$
Question 6:   Find the angle $\alpha$:

$\alpha ={33}^{\circ }$
$\alpha ={25}^{\circ }$
$\alpha ={30}^{\circ }$
$\alpha ={21}^{\circ }$
Question 7:   Find the angle $\alpha$:

$\alpha ={30}^{\circ }$
$\alpha ={10}^{\circ }$
$\alpha ={20}^{\circ }$
$\alpha ={25}^{\circ }$
Question 8:   Find the angle $\alpha$ , when $p\parallel q$ and $a=b$:

${110}^{\circ }$
${100}^{\circ }$
${140}^{\circ }$
${120}^{\circ }$
Question 9:   Find the angle $\alpha$:

${60}^{\circ }$
${50}^{\circ }$
${80}^{\circ }$
${70}^{\circ }$
Question 10:   Find the angle $\gamma$

${180}^{\circ }-\alpha -\beta$
$2\alpha -\beta$
$\alpha +\beta$
${180}^{\circ }-\alpha +\beta$