**What you’ll learn**

How to measure angles, and rules for determining when angles are congruent

How to prove and apply properties of triangles, quadrilaterals, and other polygons

How to calculate the areas of polygons, circles, ellipses, and other complex shapes

How to prove and apply the Pythagorean theorem

How line segments and angles in circles are related

How to calculate the volumes and surface areas of three-dimensional solids