Find x if x+y=z y−z=x

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

Use complete sentences to differentiate between a regular tessellation, and a pure tessellation. be sure to include specific types of polygons in your explanation.

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.