Answer:
x =20 y=70
Step-by-step explanation:
40 is on a straight line so 180- 40=140
bottom half of the big triangleis isoscleles triangle so 140+2x=180
2x=40 so x=20
and then we know that the bottom side of 90 deg is 20
so the upper triangle is 70 deg where (90 was halved)
so we know that 70+40+y=180 because it is a triangle
so then y=70
we can prove this by doing 70+90+20=180 for the bigger triangle
