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# Triangle Classification

## Categories of triangles based on angle measurements or the number of congruent sides.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Triangle Classification

Discover how to classify triangles.

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## Classifying Triangles

Learn to classify triangles.

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• PLIX

## Triangle Classification: The Obtuse Triangle

Triangle Classification Interactive

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• Video

## Triangle Classification Principles

This video gives more detail about the mathematical principles presented in Triangle Classification.

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• Video

## Triangle Classification Examples

This video shows how to work step-by-step through one or more of the examples in Triangle Classification.

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## Triangle Classification Quiz

Triangle Classification quiz.

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• Practice
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## Triangle Classification Practice

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• Interactive Exercise

## Classify or Derange

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• Interactive Exercise

## Angles of Scalene Triangles

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• Interactive Exercise

## Classify This Triangle

Displays a triangle and asks you to classify it.

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• Interactive Exercise

## Acute, Right, or Obtuse

Displays a triangle and asks you to classify it.

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• Interactive Exercise

## What Type of Triangle is This?

Displays a triangle and asks you to classify it.

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• Interactive Exercise

## Multiple Choice--Triangle Classification

Displays a triangle and asks you to classify it.

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• Interactive Exercise

## Multiple Choice--Triangle Classification 2

Displays a triangle and asks you to classify it.

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• Interactive Exercise

## Multiple Choice--Triangle Classification 3

Displays a triangle and asks you to classify it.

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• Interactive Exercise

## Acute, Right, or Obtuse Revisited

Displays a triangle and asks you to classify it.

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• Critical Thinking

## Triangle Classification Discussion Questions

A list of student-submitted discussion questions for Triangle Classification.

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To activate prior knowledge, make personal connections, reflect on key concepts, encourage critical thinking, and assess student knowledge on the topic prior to reading using a Quickwrite.

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To define and analyze the processes of a concept and build a step-by-step process using a Flow Chart.

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## Classifying Triangles

Learn new vocabulary words and help remember them by coming up with your own sentences with the new words using a Stop and Jot table.

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To activate prior knowledge, to generate questions about a given topic, and to organize knowledge using a KWL Chart.

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## Classify Triangles by Side Lengths and Angle Measures Post Read

Develop understanding of concepts by studying them in a relational manner. Analyze and refine the concept by summarizing the main idea, creating visual aids, and generating questions and comments using a Four Square Concept Matrix.

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• Real World Application

## Bridges Over Troubled Water

Find out how you can build bridges from triangles.

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• Real World Application

## Triangle Classification

How many triangles can you identify in the world around you?

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• Real World Application

## Flags Flying High

Learn about the only national flag that is not in the shape of a quadrilateral.

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• Study Guide