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Can someone explain this to me I already know the answer is 50 but how is it 50?

Can someone explain this to me I already know the answer is 50 but how is it 50?-example-1
User Stink
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1 Answer

3 votes
Angle 10 is 140 degrees

Angle 2 = Angle 10 = 140 degrees (Vertically Opposite Angles)

Angle 5 + Angle 4 = Angle 2 (Corresponding Angles)
Angle 5 + Angle 4 = 140
90 + Angle 4 = 140 (Angle 5 is 90 degrees because c is perpendicular to d)
Angle 4 = 50
User Dean Johnson
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