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

Oregon administers the ORELA Middle Grades Math exam to teachers who are seeking professional certification. Prepare for questions on triangle theorems on the exam with help from our self-paced video lessons and quizzes.

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

Use the lessons in this chapter to review the processes for solving mathematical problems that involve triangles. Prepare for the ORELA Middle Grades Math exam through videos that cover:

• Similar triangles
• Congruence postulates
• Congruence proofs
• Converse of a statement
• Transformations in corresponding figures
• Proving relationships
• Angle-Angle-Side Theorem
• Hypotenuse Angle Theorem
• Hypotenuse Leg Theorem
• Perpendicular Bisector Theorem
• Angle Bisector Theorem
• Congruency of right triangles
• Congruency of isosceles triangles

The video lessons in this Triangle Theorems & Proofs chapter are presented by knowledgeable instructors who present their material in fun and informative ways. You can also complete the multiple-choice quiz at the end of each video to test your understanding of key points and take the end-of-chapter test to help you figure out if you are ready to move on to the next chapter.

### ORELA Middle Grades Math: Triangle Theorems & Proofs Objectives

The ORELA Middle Grades Math exam is computer-based. It includes 150 multiple-choice questions that are designed to assess the knowledge of prospective teachers seeking an endorsement for teaching basic math to middle school students. The 255-minute test includes questions come from four main content areas:

• Number sense and operations
• Algebra and functions
• Measurement and geometry
• Statistics, probability and discrete mathematics

The properties, proofs and theorems related to triangles would be included within the measurement and geometry content, which makes up about 25% of the test questions. You must earn a score of 225 or higher to pass the exam.

14 Lessons in Chapter 43: ORELA 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

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