Question

in the diagram below DE is parallel to XY what is the value of y

Answer 1

y = 180 - 100

y = 80

the answer is 80

Answer 2

Answer:

Option A. $80\°$

Step-by-step explanation:

we know that

If DE is parallel to XY

then

$m< y+100\°=180\°$ ------> by supplementary angles

$m< y=180\°-100\°=80\°$