Given: m∠XOY = 20°; m∠ZOY = 70°
If ∠ZOW and ∠ZOY are supplementary angles, then what is the measure of ∠ZOW?
Supplementary angles are two angles that add up to 180°.
Since m∠ZOY = 70°, then m∠ZOW = 180° - 70° = 110°.
Therefore, the measure of ∠ZOW is 110°.