# Ch 33: TACHS: Triangle Theorems & Proofs

As your eighth-grade student prepares to pass the TACHS examination and enter a Catholic high school, they could benefit from this chapter on triangle theorems and proofs. Studying the lessons could sharpen their math skills prior to taking the entrance exam.

## TACHS: Triangle Theorems and Proofs - Chapter Summary

This chapter is made up of video lessons that teach triangle theorems and proofs. Since the TACHS examination may include questions on congruent triangles, perpendicular bisectors, similar triangles and the converse of a statement, these lessons focus on these and related subjects. Your eighth-grade student could also learn to prove triangle theorems, write proportions and identify the congruence of triangles. With dedication and effort, your student might become proficient at:

• Solving problems involving similar triangles
• Using triangle congruence postulates
• Applying the CPCTC (corresponding parts of congruent triangles are congruent) theorem
• Understanding the converse of a statement and similarity transformations
• Proving relationships
• Practice using the AAS, HA, HL, angle bisector and perpendicular bisector theorems
• Using the LL and LA theorems
• Proving a theorem and its converse

Even as the TACHS examination testing date approaches, your student can learn at his or her own pace when they have access to a mobile device or a desktop computer. The online video lessons in this chapter are developed and presented by professionals who want to help your child succeed. The engaging lessons are animated, and they consist of playback and pause functions. Video tags permit them to skip ahead from one main topic to another. Text transcripts and self-assessment quizzes add to your student's educational experience.

### TACHS: Triangle Theorems and Proofs Chapter Objectives

Students who make use of this chapter and its lessons on triangle theorems and proofs could properly address these kinds of questions on the TACHS examination. Consisting of questions that measure skills in mathematics, reading and language as well as reasoning abilities, the assessment is given on paper.

Students should bring along several pencils to the testing appointment. Calculators, cell phones and other electronic devices aren't permitted on the premises during testing. Testing takes two about hours, and there are no scheduled breaks. The examination is given in November, and scores should be received within a couple of months.

14 Lessons in Chapter 33: TACHS: 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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