Answer:
x = 22.5
<ADE = 67.5
Explanation:
Triangle = 180 degrees
180 - 1 right angle (90 degrees) = 90 degrees
90 = 4x
x = 22.5
<ADE is corresponding to <ABC, therefore <ADE is also equal to 3x. Since we know x = 22.5 already:
3 x 22.5 = 67.5
so <ADE = 67.5