Answer:
In figure 2. x = 20°
In figure 4. x = 30°
Explanation:
In figure 2.
The total measure of angle is 90°
From the figure we get,
76° + (x - 6)° = 90°
76 + x - 6 = 90
x + 70 = 90
x = 90 - 70 = 20°
Therefore the the value of x= 20°
In figure 4.
Total measure of angle is 90°
from figure we get 3x = 90°
x = 90/3 = 30°
Therefore value of x = 30°