Respuesta :
Answer:
angle don+angle gil=90°
don+ 74°=90°
don=90°-74°
don=16°
angle e + angle a=180°
128°+angle a=180°
angle a=180°-128°
angle a=52°
Answer:
1. 16°
2. 52°
Step-by-step explanation:
So!! Complementary angles add up to 90 degrees, and supplementary angles add up to 180 degrees. With this, it should be really easy. To find the measure of angle DON:
m∠DON + m∠OIL = 90°
m∠DON + 74°=90°
m∠DON=16°
For the measure of angle A:
m∠A+m∠E=180°
m∠A+128°=180°
m∠A=52°
Hope this helped!