Test: Angles, Straight Lines - Challenging

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Question 1:   Find an angle corresponding to 15 11 revolution
245.45
409.09
151
490.91
Question 2:   Find the angle α :
α=80°
α=45°
α=60°
α=70°
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?
45
60
90
30
Question 4:   Find the angle α , when pq :

60
40
30
50
Question 5:   Find the angle α :

90
100
70
80
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