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# Area and Perimeter of Triangles

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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.

## Area and Perimeter of Triangles

by CK-12 //at grade

This concept teaches students to find the area and perimeter of triangles.

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• Video

## Area and Perimeter of Triangles Principles

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This video gives more detail about the mathematical principles presented in Basic Geometric Definitions.

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• Video

## Area and Perimeter of Triangles Examples

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This video gives more detail about the mathematical principles presented in Basic Geometric Definitions.

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## Area and Perimeter of Triangles Quiz

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Nine question quiz. Students must solve for the area, perimeter, and missing sides of triangles.

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• Interactive Exercise

## Find the Perimeter of this Polygon

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A polygon and a side length is given. Determine the perimeter.

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• Interactive Exercise

## Perimeter of Equilateral Triangle ABC

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Presents details about the side lengths of an equilateral triangle and asks the perimeter.

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• Interactive Exercise

## What is Perimeter?

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Checks your understanding of what perimeter means.

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• Interactive Exercise

## What is Area?

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Checks your understanding of what area means.

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• Practice

## Area and Perimeter of Triangles Practice

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Practice Area and Perimeter of Triangles questions

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• Interactive Exercise

## What is the area of a triangle?

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Checks your understanding of what the area of a triangle is.

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• Interactive Exercise

## What is the area of a rectangle?

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Checks your understanding of what the area of a rectangle is.

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• Interactive Exercise

## How does the Perimeter or Area Change?

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Checks your understanding of similar triangles.

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• Interactive Exercise

## How does the Perimeter or Area Change (part 2)?

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Checks your understanding of how perimeter and area change when a figure gets scaled.

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• Interactive Exercise

## Side Length of Equilateral Triangle ABC

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Presents details about the side lengths of an equilateral triangle and asks the perimeter.

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• Critical Thinking

## Area and Perimeter of Triangles Discussion Questions

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A list of student-submitted discussion questions for Area and Perimeter of Triangles.

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## Area and Perimeter of Triangles Pre Read

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To stress understanding of a concept by summarizing the main idea and applying that understanding to create visual aids and generate questions and comments using a Concept Matrix.

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## Area and Perimeter of Triangles Post Read

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To stress understanding of a concept by summarizing the main idea and applying that understanding to create visual aids and generate questions and comments using a Concept Matrix.

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## Find the Dimensions and Area of Triangles

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Come up with questions about a topic and learn new vocabulary words to determine answers using an Ask, Answer, Learn table.

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• Pre and Post Read

## Area and Perimeter of Triangles KWL Chart

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With this KWL Chart, reflect on your prior knowledge of a concept, come up with questions you’re curious about, and come up with answers from the reading.

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• Real World Application

## Fly Free!

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Find out how triangles are incorporated into the design of hang gliders.

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• Real World Application

## Perimeter

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How would you use perimeter and area in designing a scooter race track?

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• Study Guide

## Triangles and Quadrilaterals Study Guide

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This study guide reviews the formulas for the perimeter and area of triangles and different types of quadrilaterals.

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