Vertical angles
The question
degrees
Vertical angles
How it works.
57°andx
opposite=equal
57°→57°
- 01
Two straight lines crossing. Nothing needs to add to 90 or 180 here.
- 02
Angles opposite each other at a crossing are equal — each one makes a straight line with the same neighbor.
- 03
So x is 57° — the same as the one across from it, not 180 minus it.