In this lesson you are going to learn a lot about polygons. A polygon is a closed figure formed by coplanar segments such that the sides are non-collinear, and each side intersects exactly two other sides at their endpoints. Polygons can be convex and concave, and you'll learn the difference between these two. Some special types of polygons are regular polygons. Regular polygons are convex polygons with all sides congruent and all angles congruent. They have some special properties, which you'll learn about. This lesson also covers the interior angle sum and the exterior angle sum.
*These practice questions are only helpful when you work on them offline on a piece of paper and then use the solution steps function to check your answer.
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.