INC Angles and Transversals

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What are Same Side Interior Angles?

Back

Same Side Interior Angles are pairs of angles that lie on the same side of a transversal and between two parallel lines. They are supplementary, meaning they add up to 180°.

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What are Alternate Interior Angles?

Back

Alternate Interior Angles are pairs of angles that lie on opposite sides of a transversal and between two parallel lines. They are congruent, meaning they have equal measures.

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What are Corresponding Angles?

Back

Corresponding Angles are pairs of angles that lie on the same side of the transversal and in corresponding positions relative to the two parallel lines. They are congruent.

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What are Vertical Angles?

Back

Vertical Angles are pairs of angles that are opposite each other when two lines intersect. They are congruent.

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What does it mean for angles to be Supplementary?

Back

Supplementary angles are two angles whose measures add up to 180°.

Front

If two parallel lines are cut by a transversal, what can be said about the Alternate Exterior Angles?

Back

Alternate Exterior Angles are congruent when two parallel lines are cut by a transversal.

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What is the relationship between Same Side Exterior Angles?

Back

Same Side Exterior Angles are supplementary when two parallel lines are cut by a transversal.

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How do you find the measure of an angle when given its supplementary angle?

Back

To find the measure of an angle that is supplementary to a given angle, subtract the measure of the given angle from 180°.

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Back

Front

What is the sum of the measures of angles on a straight line?

Back

The sum of the measures of angles on a straight line is 180°.