2-D Shapes

So far, you have learned a lot about triangles and quadrilaterals in this course.  This unit will go deeper into other polygons and circles.  Both of these shapes should be familiar to you from earlier math courses, but there are a lot of characteristics and properties about these shapes that are unfamiliar to you.  We will start by describing both shapes.

A polygon is a closed plane figure formed by 3 or more segments that intersect only at their endpoints.  Examples of polygons are triangles, quadrilaterals, hexagons, etc.

A circle is  a shape where all points are equidistant from the center.  The best object to represent a circle is a hula-hoop.