Answer:
Angle 1 is 80°.
Explanation:
In the right angle triangle, we can find the unknown angle at the top.
180 - 90 - 50 = 40° (sum of angles in triangle=180)
Next, we can subtract 40° from 90° to find the adjacent angle in the other triangle.
90 - 40 = 50°
Angle 1 = 180 - 50 - 50
= 80° (sum of angles in triangle=180)