Question

In a parallelogram ABCD, if angle isA=(3x – 20)°, angle B = (y + 15)°, angle C = (x + 40)°, then find the value X+ Y​

Answer 1

Step-by-step explanation:

opposite angles in a parallelogram are equal therefore

angle A = angle C

3x-20=x+40

2x=60

x=30

angle A+ angle B+angle C+angleD=360

angle D= 360-(70+y+15+70)

angle D= 225+y

angle B+ angle D= y+15=y+225

x+y=30