Question

Please help me to solve this ​

Answer 1

1: Angles in a triangle add up to 180°. The square represents a right angle (90°)

`x=180-90-60=30`

2:

`y=180-100-45=35`

3:

Angles on a straight line add up to 180°.

`x=180-70=110`

4:

`y=180-120=60`