STEAM Geometry A - Unit 2 Vocabulary

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Last updated 1:28 PM on 8/7/26
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17 Terms

1
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Point

An exact position or location

<p>An exact position or location</p>
2
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Line

A series of points extending infinitely in both directions

<p>A series of points extending infinitely in both directions</p>
3
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Line Segment

A portion of a line with two end points

<p>A portion of a line with two end points</p>
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Midpoint

The point on a line segment that splits it into two congruent parts

<p>The point on a line segment that splits it into two congruent parts</p>
5
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Segment Bisector

A line or segment that splits another segment into two congruent parts

<p>A line or segment that splits another segment into two congruent parts</p>
6
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Plane

A flat 2d surface that extends infinitely

<p>A flat 2d surface that extends infinitely</p>
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Ray

A series of points that extends infinitely in one direction

<p>A series of points that extends infinitely in one direction</p>
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Angle

Two rays that share a common point

<p>Two rays that share a common point</p>
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Vertex

The shared point of an angle’s rays; a corner

<p>The shared point of an angle’s rays; a corner</p>
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Acute Angle

An angle that is less than 90°

<p>An angle that is less than 90°</p>
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Right Angle

An angle that measures exactly 90°

<p>An angle that measures exactly 90°</p>
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Obtuse Angle

An angle that measures more than 90° but less than 180°

<p>An angle that measures more than 90° but less than 180°</p>
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Straight Angle

An angle that measures exactly 180°

<p>An angle that measures exactly 180°</p>
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Angle Bisector

A line or segment that splits an angle into two congruent parts

<p>A line or segment that splits an angle into two congruent parts</p>
15
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Adjacent Angles

Two angles that share the same vertex

<p>Two angles that share the same vertex</p>
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Parallel

Lines or segments that do not cross

<p>Lines or segments that do not cross</p>
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Perpendicular

Lines or segments that form right angles at their intersection

<p>Lines or segments that form right angles at their intersection </p>