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Answer:
Left Rectangle = C = 51°
Right Rectangle = A = 36°
B = 54°
Step-by-step explanation:
Sum of all angles in a triangle = 180°
First figure (referring ung nasa kaliwa)
Given: 39° and 90°
39 + 90 = 129°
180° - 129° = 51
Missing Angle = 51°
Second figure (ung nasa kanan)
Given: 54° and 90°
90 - 54= 36
a = 36
b = 90 - 36 = 54