Answer:
<A=27°
Explanation:
D=63°
B= 90°
Angles in a triangle adds up to 180°
Therefore A= 180- (63+90)
=180 - 153
=27
27°
angle A + angle B + angle C=180 degree (sum of interior angles of a triangle )
angle A +90 + 63 =180
angle A +153 = 180
angle A =180 - 153
angle A =27 degree
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