# Ch 41: GACE Middle Grades Math: Triangle Theorems & Proofs

Watch these video lessons to review triangle theorems and proofs. In addition to the lessons, quizzes and a chapter exam offer effective study methods to prepare you to take the GACE Middle Grades Mathematics test.

## GACE Middle Grades Math: Triangle Theorems & Proofs - Chapter Summary

Our instructors re-familiarize you with various triangle theorems and proofs to get you ready to answer geometry questions on the GACE Middle Grades Mathematics test. Lessons cover the following topics:

• Applications of similar triangles
• The SAS, ASA and SSS triangle congruence postulates
• The converse of a statement
• Similarity transformations in corresponding figures
• Using congruence and similarity to prove relationships in figures
• The AAS, HA and HL theorems
• The perpendicular bisector and angle bisector theorems
• The LA and LL theorems
• Congruency of isosceles triangles

These short, engaging video lessons offer an easy way to study geometry. Re-watch the video lessons as often as necessary to grasp the materials, or, if you want to see only main points, use video tags to jump to that section of the lesson. Video lessons often include links to text lessons that detail key terms. Lesson transcripts also can be used as an additional study aid.

14 Lessons in Chapter 41: GACE Middle Grades Math: Triangle Theorems & Proofs
Test your knowledge with a 30-question chapter practice test
Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

### Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.