Answer:
G = 50
H = 80
I = 50
Step-by-step explanation:
Angle in a triangle is equal to 180. This means that we will equal all the angles to 180
2x + 2x + 4x-20 = 180
8x - 20 = 180
8x = 180 + 20
8x = 200
x = 200 / 8
x = 25
G = 2 * 25 = 50
I = 2 * 25 = 50
H = 4 * 25 - 20
H = 100 - 20 = 80
