Question

Determine the value of z.

Answer 1

121º

Explanation:

Once interior angles of a triangle sum 180º, the remaining angle is:

34º + 87º + x = 180º

x = 59º

Once ∠x and ∠z are supplementary angles (add up to 180º), ∠z = 121º

Answer 2

121°

Explanation:

The sum of the a triangle's angles is 180°

so the missing angle: 180°-(87°+34°) = 59°

so z°= 180°-59°= 121°