Question

Given that the measure of ∠x is 123°, and the measure of ∠y is 51°, find the measure of
∠z.

Answer 1

$∠x = 123° \\ ∠y = 51 \degree \\ ∠z = {?} \\ ∠x + ∠y + ∠z = 180\degree \\ 123° + 51° + ∠z = 180\degree \\ ∠z = 180\degree - 174\degree \\ ∠z = 6 \degree$

Answer 2

$∠x = 123° \\ ∠y = 51 \degree \\ ∠z = {?} \\ ∠x + ∠y + ∠z = 180\degree \\ 123° + 51° + ∠z = 180\degree \\ ∠z = 180\degree - 174\degree \\ ∠z = 6 \degree$