Question

The sides BA and DC of a quadrilateral ABCD are produced as shown below. Show that x+y=a+b.

Answer 1

x+y+a+b=360° (angle sum property of quadrilateral)
x+y+x+y=360° (x+y=a+b)
2x+2y=360°
2(x+y)=360°
x+y=360/2
x+y=180°
a+b=180°
x+y=a+b

Hence,proved

Answer 2

MARK AS BRAINLIEST......