Question

angle B = 81°
angle C =45°
angle A = ?​

Answer 1

Answer:

180= angle b+ angle c +angle a

180=81+45+angle a

180-126=angle a

54°=angle a

Answer 2

Answer:

81 + 45 + angle A = 180

126 + angle A = 180

angle A = 180 _ 126

angle A = 54