Question

in the given figure ABCD is a rhombus in which angle BCD is 100, find the value of angle x+y ?

Answer 1

as rhombus is a parallelogram
AB//DC
So,x+y+100=180°(co-interior angles)
x+y=80°

Answer 2

we know that the sum of consecutive interior angle is 180°.
therefore,
x+y=180-100
orx+y=80