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Alternate interior angles are created when a transversal intersects two lines. Each angle is inside the lines, but on opposite sides of the transversal.
If the lines are parallel then the alternate interior angles are equal to each other.

## Alternate Interior Angles - Math is Fun

www.mathsisfun.com/geometry/alternate-interior-angles.html

To help you remember: the angle pairs are on Alternate sides of the Transversal, and they are on the Interior of the two crossed lines.

## Definition of Alternate Interior Angles - Math is Fun

www.mathsisfun.com/definitions/alternate-interior-angles.html

Alternate Interior Angles. more ... When two lines are crossed by another line ( which is called the Transversal), the pairs of angles • on opposite sides of the ...

## Mathwords: Alternate Interior Angles

www.mathwords.com/a/alternate_interior_angles.htm

In the drawing below, angles 3 and 6 are alternate interior angles, as are angles 4 and 5. Alternate interior angles are congruent. Formally, alternate interior ...

## Alternate Interior Angles definition - Math Open Reference

www.mathopenref.com/anglesalternateinterior.html

Alternate Interior Angles are created where a transversal crosses two (usually parallel) lines. Each pair of these angles are inside the parallel lines, and on ...

## Alternate Interior Angles: Definition, Theorem & Examples - Video ...

In this lesson, you will learn how to identify alternate interior angles and how to use the theorem to find missing angles and to solve everyday...

## Alternate Interior Angles Theorem - Varsity Tutors

www.varsitytutors.com/hotmath/hotmath_help/topics/alternate-interior-angles-theorem

The Alternate Interior Angles Theorem states that, when two parallel lines are cut by a transversal, the resulting alternate interior angles are congruent.

## Alternate Interior Angles - Varsity Tutors

www.varsitytutors.com/hotmath/hotmath_help/topics/alternate-interior-angles

The term alternate interior angles is often used when two lines are cut by a third line, a transversal.

## Alternate Interior Angles - Concept - Geometry Video by Brightstorm

www.brightstorm.com/math/geometry/reasoning-diagonals-angles-and-parallel-lines/alternate-interior-angles/

Time-saving video on how to identify alternate interior angles formed by a transversal intersecting two parallel lines. Example problems applying alternate ...

## Alternate interior & exterior angles (solutions, examples, videos)

www.onlinemathlearning.com/alternate-interior-angles.html

Alternate Interior Angles & Alternate Exterior Angles - relationships of various types of paired angles, proof of the alternate interior angle theorem, proof of the ...