Question

Find the measure of each number angle?
1
2
3
4​

Answer 1

The values of angles 1, 2, 3 and 4 are : 55, 60, 60 and 65 respectively.

For angle 1 :

• Angle 1 + 125 = 180 (sum of angles on a straight line)

Angle 1 = 180 - 125

Angle 1 = 55°

Angle 3 :

• Angle 3 + 30 + 90 = 180 (sum of angles in a triangle)
• Angle 3 = 60°

Angle 2 :

• Angle 2 + 30 + 90 = 180 (sum of angles in a triangle)
• Angle 2 = 60°

Angle 4 :

• Angle 4 + 55 + 60 = 180 (sum of angles in a triangle)
• Angle 4 = 65°