# Alternate Interior Angles

## Angles on opposite sides of a transversal, but inside the lines it intersects.

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## Alternate Interior Angles

This concept introduces students to alternate interior angles and how to use them to determine whether or not lines are parallel.
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## Alternate Interior Angles

by Math Writing Team //at grade
Use alternate interior angles to determine angle congruency and the presence of parallel lines.
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## Alternate Interior Angles

Alternate Interior Angles Interactive
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## Alternate Interior Angles Principles

This video gives more detail about the mathematical principles presented in Alternate Interior Angles.
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## Alternate Interior Angles Examples

This video shows how to work step-by-step through one or more of the examples in Alternate Interior Angles.
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• Critical Thinking

## Alternate Interior Angles Discussion Questions

A list of student-submitted discussion questions for Alternate Interior Angles.
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• Real World Application

## Alternate Interior Angles

How did Eratosthenes use alternate interior angles to prove the earth is round?
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• Real World Application

## Alternate Interior Angles

How did Eratosthenes use alternate interior angles to prove the earth is round?
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• Study Guide