Question

solve this question

Answer 1

Answer:

Step-by-step explanation:

Let angle A and angleD be x ;4x and 5 x

Sum of adjacent angles of quadrilateral=180°

4x +5x=180°

X=20°

Therefore,angle A =4×20°=80°

Angle D=5×20°=100°

Same as angle B and C

3x-15°+4x+20°=180°

X=25°

Therefore,angle B=3×25°-15°=60°

Angle C=4×25°+20°=120°