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# Isosceles Triangles

## Properties of triangles with two equal 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.

## Isosceles Triangles

by CK-12 //basic
Apply the properties of isosceles triangles.
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## Isosceles Triangles

This concept will teach students the properties of isosceles triangles and how to apply them to different types of problems.
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## SLT 46 Prove & apply base angles of isosceles triangles are congruent and its converse.

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## Isosceles Triangles.

This concept will teach students the properties of isosceles triangles and how to apply them to different types of problems.
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• PLIX

## Isosceles Triangles

Isosceles Triangles Interactive
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• PLIX

## The Three Angle Problem

Isosceles Triangles Interactive
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• PLIX

## Thale's Theorem

Isosceles Triangles Interactive
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• Video

## Equilateral and Isosceles Example Problems

by CK-12 //basic
A video showing how to solve for the remaining angle/bases of an isosceles triangle, as well as solving the same problem using an equilateral triangle.
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• Video

## Isosceles Triangles Principles - Basic

by CK-12 //basic
This video provides the student with a walkthrough on Isosceles triangles.
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• Video

## Isosceles Triangles Examples - Basic

by CK-12 //basic
This video provides the student with a walkthrough of one or more examples from the concept "Isosceles Triangles".
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• Video

## Isosceles Triangles Principles

This video gives more detail about the mathematical principles presented in Isosceles Triangles.
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• Video

## Isosceles Triangles Examples

This video shows how to work step-by-step through one or more of the examples in Isosceles Triangles.
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• Video

## How To Construct An Isosceles Triangle

by CK-12 //basic
Shows how to construct an isosceles triangle with a compass and straight edge.
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• Video

## Proof of the Isosceles Triangle Theorem

by CK-12 //basic
Provides a two column proof of the isosceles triangle theorem.
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• Video

## Using the Properties of Isosceles Triangles to Determine Values

by CK-12 //basic
Shows example problems of how to use the properties of isosceles triangles to solve for unknown values.
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## Isosceles Triangles Quiz

Ten question quiz. Students will solve for missing angles and sides of isosceles triangles using basic arithmetic and algebra. One question involves the exterior angle theorem. For one question students must draw an isosceles triangle with two given angle measurements.
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• Critical Thinking

## Isosceles Triangles Discussion Questions

A list of student-submitted discussion questions for Isosceles Triangles.
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• Real World Application

## Triangles in the Sky

Learn why isosceles triangles are incorporated into the design of stealth bomber aircraft.
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• Real World Application

## Isosceles Triangles

Make isosceles triangles using origami.
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• Study Guide

## Triangle Relationships Study Guide

This study guide reviews terminology for triangles, different types of triangles, and interior and exterior angles theorems.
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• Flashcards

## Isosceles, Right, and Equilateral Triangles Flashcards

by CK-12 //basic
These flashcards help you study important terms and vocabulary from Isosceles Triangles and Equilateral Triangles.
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