Angles

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Acute

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Measures below 90º

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Right

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Equal to 90º

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15 Terms

1
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Acute

Measures below 90º

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Right

Equal to 90º

3
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Obtuse

Larger than 90 but less than 180º

4
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Straight

Equal to 180º

5
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Complementary Angles

Angles that add up to 90º

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Supplementary Angles

Angles that add up to 180º

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Vertical Angles

Angles that are equal

8
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Adjacent Angles

Angles with a common side and vertex

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Ray

Contains one endpoint and extends forever in one direction

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Segment

A portion of a line that has two endpoints

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Perpendicular Lines

Two lines which intersect at right angles

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Transversal Line

Line that crosses two or more lines

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Alternate Interior Angles

Two angles on different sides formed inside two parallel lines

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Alternate Exterior Angles

Two angles on different sides formed outside parallel lines

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Corresponding Angles

Angles on the same side, one interior and one exterior, but not adjacent.