Answer:
45°
Step-by-step explanation:
three angles in a triangle sum up to 180
90° + a + a = 180°
90° + 2a = 180°
2a = 180°-90°
2a = 90°
a = 45°
D.
4800 good luck
3.2h+1.6
3h-2(-0.1h-0.8)
3h+0.2h+1.6
