find the measure of each unknown angle in triangle ABC. A=x, B=48, C=x
If ∠B = 48° and both ∠A = x° and ∠C = x°
Since there are 180° in the angles of a triangle,
∠A + ∠B + ∠C = 180° ---> x° + 48° + x° = 180° --- 2x° + 48° = 180°
---> 2x° = 132° ---> x° = 66°