In this lesson we are going to prove some angle relationships. The first one we are going to cover is the supplement theorem. This theorem says that if two angles form a linear pair, then they are supplementary angles. A linear pair actually means that they form a line and that they add up to 180 degrees. Next you'll learn about the congruence of angles and some of the properties of the congruence, like the reflexive property, and the symmetric property. This lesson covers a lot of angle theorems. One of them tells us about right angles, and the other one about vertical angles. Also, you'll learn how perpendicular lines intersect.
*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.
Proving Angle Relationships
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.