w + x + y + z =

Supplementary angles are pairs of given angles which sums up to
. Thus it can be observed that measure of angle w is supplementary to z, and measure of x is supplementary to y. As such;
w + z = 180
x + y = 180
(w + z) +( y + x)
180 + 180 =

Therefore, it can be inferred that:
w + x + y + z =
