Lines AB and CD intersect at O. If ∟1 = 130˚, then find ∟2 , ∟3 and ∟4.
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Answer:
given
1. angle 1= 130°
2. Lines AB and CD intersect at O
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find
∟2 , ∟3 and ∟4.
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angle 1 = angle 2 [ vertically opposite angles]
so angle 2 = 130°
angle 1 + angle 4= 180° [ adjacent pair]
angle 4= 180° -130°= 50°
angle 4= angle 3 [ vertically opposite angles]
angle 3= 50°
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