Let the measure of third angle be x

According to the question, each of the remaining two angles are twice of x.

Third angle = x

Each equal angle = 2x

Sum of all angles of a triangle = 180°

x + 2x + 2x = 180°

5x = 180°

x = 180 ÷5 = 36 °

x = 36°

Therefore, third angle = x = 36° and each equal angle = 2x = 2( 36° ) = 72°

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