Test: Circles I - Challenging

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Question 1:   Find α , if β=56° :
α=28°
α=45°
α=112°
α=50°
Question 2:   Find AOB :
AOB=50°
AOB=60°
AOB=40°
AOB=45°
Question 3:   Find AB :
AB16.55
AB16.85
AB15.45
AB15.95
Question 4:   Find α :
α=220°
α=215°
α=230°
α=200°
Question 5:   Find α , where β=43°
α=43°
α=21.5°
α=86°
α=42°
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