For this lesson, we are going to go over three-dimensional figures. Another word for three-dimensional figures is solids; now, some specific types of solids are polyhedrons. Whenever you have a three-dimensional solid with all flat surfaces, meaning that all of the sides of that solid are flat, then it is a polyhedron. You'll see some examples of polyhedrons in the video. You'll also learn about the three parts of polyhedrons: faces, edges, and vertices. This lesson also covers the five types of regular polyhedra (the platonic solids). When a plane intersects, or slice, a solid figure, different shapes are formed. Youll learn about them in this lesson.
*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.