Help with quick question???
I know a triangle equals 180 when you add up all sides and you count the edges of a polygon to see how many triangles it is made up of etc. but I have no idea how to solve an incoherent mass of angles
Find the measure of angle XYZ
https://cds.flipswitch.com/tools/asset/media/469885

Question

directrix · Answer

The sum of the exerior angles, one per vertex, of a convex polygon is 360.

directrix · Answer

4a - 5 + 3a + 4 + a - 9 + 2a = 360

Solve for a.

angle XYZ has measure two times whatever you get for the value of a.

anonymous · Answer

Thanks!!

directrix · Answer

You are welcome.