Solve Quadrilateral Angles in 30 Seconds!

Added: 2026-05-24

[00:00:00]You're looking at a quadrilateral. The sum of the angles in a quadrilateral is 360, which means all these angles that you're looking at right now are going to add up to 360, including this corner, which is 90 degrees. So, that's what I'm going to do. Start by adding those all up, setting them equal to 360, combining all those constants, and doing some algebra, and we get x equal to 3.