Answer:
1:3
Step-by-step explanation:
12/36=1/3
Angle 1 = 80 (by definition)
Angle 3 = 180 - 80 = 100
Angle 4 + Angle 2 = 90
Also, Angle 2 = 40 (by definition)
So Anglee 4 = 50
x²=100
x²=10×10
x=10
hope it helps you