Geometry Chapter 1 Vocab

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Last updated 1:22 AM on 9/1/26
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18 Terms

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Straight Angle

An angle that measures equal to 180 degrees

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Right Angle

An angle equal to 90 degrees

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Supplementary Angles

Two angles whose sum is 180 degrees

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Complementary Angles

Two angles whose sum is 90 degrees

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Vertical Angles

Two angles formed from two pairs of opposite rays

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Line

A straight path extending in opposite directions without end

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Opposite Rays

Two rays that share the same endpoint and form a line

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Point

A location in space

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Obtuse Angles

An angle greater than 90 degrees

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Adjacent Angles

Two angles that share a vertex and a ray and do not overlap

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Plane

A flat surface that extends without end and has no thickness

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Segment

Part of a line with two endpoints

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Angles

The space formed when two rays share the same endpoint

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Acute Angle

An angle less than 90 degrees

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Midpoint

A point that divides a segment into two congruent segments

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Angle Bisector

A ray interior to an angle that forms two congruent segments

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Linear Pair

A pair of angles that are adjacent and supplementary

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Ray

Part of a line one endpoint and all points on one side of the endpoint