Ch 25: COOP Exam: Triangles

About This Chapter

Use these videos and quizzes to brush up on your knowledge of triangles and the solving of triangle problems. You will find this material helpful as you prepare to take the COOP exam.

COOP Exam: Triangles - Chapter Summary

The lessons in this chapter are designed to help you understand and apply problem-solving practices regarding triangles. You can review processes for solving perimeter, area and angles, in addition to classifying and defining triangles. The following topics are reviewed in these lessons:

  • Identifying the parts and properties of a triangle
  • Classifying types of triangles
  • Solving specific triangle problems
  • Identifying similar triangles
  • Constructing and illustrating triangles
  • Discussing concurrent lines in a triangle
  • Defining median, altitude, and angle bisector
  • Applying concepts to solve problems regarding other shapes

Short, fun videos and visual examples can be helpful in retaining the material addressed in these lessons. Accompanying quizzes are used to gauge what you have retained and areas in which you need further review.

COOP Exam: Triangles Chapter Objectives

Mastering the material covered in the Triangles chapter can assist you in taking the mathematical portion of the COOP's achievement component. The math portion covers reasoning, functions, patterns, relations, and other concepts.

The paper-based exam includes 180 multiple-choice questions and is given to New Jersey students in 8th grade who are looking to enter a Catholic High school. When scores are compared to those of same-grade students, a 'good' score is considered in the 50th-74th percentile, with 'very strong' scores at or above the 75th percentile.

9 Lessons in Chapter 25: COOP Exam: Triangles
Test your knowledge with a 30-question chapter practice test
Triangles: Definition and Properties

1. Triangles: Definition and Properties

What makes a shape a triangle? In this lesson, we'll explore the definition of a triangle, then analyze the parts of triangles, including the vertices, base and height.

Classifying Triangles by Angles and Sides

2. Classifying Triangles by Angles and Sides

Not all triangles are the same. There are equilateral, isosceles and scalene triangles. Then there are right, acute and obtuse triangles. In this lesson, we'll learn how to classify triangles using their sides and angles.

Interior and Exterior Angles of Triangles: Definition & Examples

3. Interior and Exterior Angles of Triangles: Definition & Examples

Knowing just a few things about the interior or exterior angles of triangles is sometimes all you need to put all the pieces together. Find out more in this lesson.

How to Identify Similar Triangles

4. How to Identify Similar Triangles

Similar triangles have the same characteristics as similar figures but can be identified much more easily. Learn the shortcuts for identifying similar triangles here and test your ability with a quiz.

Angles and Triangles: Practice Problems

5. Angles and Triangles: Practice Problems

Want more practice solving with angle pairs? How about more review for solving angles in triangles? Look no further. Get more practice here, and test your ability with a quiz.

Constructing the Median of a Triangle

6. Constructing the Median of a Triangle

If you have one triangle and want to divide it, you can use a median line. Medians have special geometric properties that we'll learn about in this lesson.

Median, Altitude, and Angle Bisectors of a Triangle

7. Median, Altitude, and Angle Bisectors of a Triangle

Line segments in triangles are just clutter; they have special names and qualities depending on how they're drawn. In this lesson, we'll learn about medians, altitudes and angle bisectors.

Constructing Triangles: Types of Geometric Construction

8. Constructing Triangles: Types of Geometric Construction

When you're asked to construct a triangle, it's time to break out that compass and straight edge! In this lesson, find out how to construct triangles no matter what you're given.

Properties of Concurrent Lines in a Triangle

9. Properties of Concurrent Lines in a Triangle

Centroids, orthocenters, incenters, circumcenters, oh my! Don't worry though. In this lesson, we master the various terms for concurrent lines in triangles and match them to altitudes, angle bisectors, perpendicular bisectors and medians.

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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