Question

If ∠A and ∠B are two adjacent angles of a parallelogram. If ∠A = 70°, then ∠B = ?​

Answer 1

Answer:

angleA=70

angle C=70

A+B+C=180

HENCE angle B=40

Answer 2

Answer:

first take 3 angle /_A,/_B and /_C, THEN ANGLE A = 70°,ANGLE B = X, AND ANGLE C = X.THEN THE HERE USE THE SUPPLEMENTARY METHOD. ANGLE A + ANGEL B + ANGLE C = 180°

70° + X + X = 180°

70° + 2X = 180°

2X = 180° - 70°

2X = 110°

X = 110°÷2

x = 55.