Answer:
39 39 102
Explanation:
m∠A = 39°
m∠B = 39°
m∠C = 102°
m∠A + m∠B + m∠C = 180°
x + x + (x + 63) = 180
3x + 63 = 180
3x = 117
x = 39°
m∠C = m∠A + 63 = 39 + 63 = 102°
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