We just finished learning about 3-D shapes, angles, circles, and other polygons. Review the topic's concepts by checking out the Blendspace module below. Things to remember:

- The sum of all central angles of any polygon is always 360 degrees
- The sum of the interior angles of a triangle is always 180 degrees
- Congruent means that 2 shapes are exactly the same
- Similar shapes are the same shape, but not the same size
- Similar shapes must have proportional sides and congruent corresponding angles