# Ch 43: NES Middle Grades Math: Triangle Theorems & Proofs

Get more practice in working with triangles in this chapter covering several proofs and theorems used to evaluate triangles. Get realistic NES Middle Grades Mathematics test practice by completing the lesson quizzes and chapter test.

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

Triangle proofs deserves its own chapter, and here you have it. Here we help you prepare for the National Evaluation Series (NES) Middle Grades Mathematics exam by giving in-depth instruction on the critical theorems you are likely to be tested on. The proofs and theorems described here include:

• Congruence postulates and proofs
• Similarity transformations
• AAS, HA, and HL theorems
• Perpendicular bisector and angle bisector theorems
• Congruency in right and isosceles triangles

Our talented math instructors walk you through each theorem and/or proof, providing useful real-world examples to help drive the principles home. The video lessons contain fun, original graphics to give you plentiful mental queues to draw upon on test day. Be sure to take the quizzes and chapter test for practice answering the kinds of questions you are likely to experience on the real exam.

### NES Middle Grades Math: Triangle Theorems & Proofs Chapter Objectives

This chapter is one of several that focuses on the Measurement and Geometry content domain of the NES Middle Grades Mathematics exam. This domain accounts for 25% of the test content and includes Objective 0008, which focuses on Euclidean geometry. There are 150 multiple-choice questions overall in the exam, which you must answer in less than 4 hours and 15 minutes. The passing score is the national benchmark score of 220 on a scale of 100-300. Though you will have to wait a couple of weeks to get your score report, you will know immediately after the test whether you passed. Check out the NES website for more detailed test information, testing dates/locations, and to receive your detailed score report.

14 Lessons in Chapter 43: NES 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.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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