Answer:
YWZ
Step-by-step explanation:
The angle that is out side of the 180 degree is the complantary angle
Answer: 30° and 60°
This two angles are complementary to the shown 90° to complete the half a circle of 180°.
30°+90°+60°=180°
30°+60°+90°=180°
90°+90°=180°
