Question

The angles measure (30-a)° and (125+2a)° of two angles are supplement of each other . Find the value of a

Answer 1

Sum of supplement angles =180°

First angle = (30-a)°
Second angle=(125+2a)°

30-a+125+2a=180°
155°+a=180°
a=180°-155°
a=25°.
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