Test: Angles, Straight Lines - Challenging

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

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

70
80
90
100
Question 6:   Find the angle α :

α= 33
α= 25
α= 30
α= 21
Question 7:   Find the angle α :

α= 30
α= 10
α= 20
α= 25
Question 8:   Find the angle α , when pq and a=b :

110
100
140
120
Question 9:   Find the angle α :

60
50
80
70
Question 10:   Find the angle γ

180 αβ
2αβ
α+β
180 α+β