For this lesson, we are going to talk about some properties of equality, and we are going to work on some proofs. The first property you'll learn about is the addition property of equality. This property says that, if you have two numbers that are equal, for example a=b, then you can add the same number to a and b, and the equality will remain. Similar to this one is the subtraction property of equality: this time we subtract a number, instead of adding. Another similar property is the multiplication property of equality, and the division property. This lesson also covers the reflexive property, the symmetric property, the transitive property, and some others.
2. Definition of complementary angles
4. Difinition of supplementary angles
5. Subtraction property of equality
6. Transitive property of equality
7. Subtraction property of equality
8. Addition property of equality
*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.
Proofs in Algebra: Properties of Equality
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.