Geometry Vocab Unit 1

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Geometry & Trigonometry

Unit 1

Vocabulary

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16 Terms

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Point

A location in space

<p>A location in space</p>
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Line

A collection of points that goes on infinitely in both directions

<p>A <strong><em>collection</em></strong> of points that goes on infinitely in both directions</p>
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Ray

A line segment with one endpoint that is always first

<p>A line segment with <strong><em>one</em></strong> endpoint that is always first</p>
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(line) Segment

Part of a line with two endpoints

<p>Part of a line with <strong><em>two</em> </strong>endpoints</p>
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Plane

Flat surface that all points/lines exist on

(lines, rays, segments, etc)

<p>Flat surface that all points/lines exist on </p><p>(lines, rays, segments, etc)</p>
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Angle

The space between two connected lines/rays/segments

<p>The space between two connected lines/rays/segments</p>
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Vertex

The middle of the angle/point where they intersect

<XZY

<p>The middle of the angle/point where they intersect</p><p>&lt;X<u>Z</u>Y</p>
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Perpendicular Lines

Two lines that make a 90° angle when they intersect

<AB> ⊥ <XY> meams AB is perpendicular to XY

<p>Two lines that make a 90° angle when they intersect</p><p>&lt;AB&gt; <span style="color: rgb(238, 240, 255)"><strong>⊥ </strong>&lt;XY&gt; meams AB is perpendicular to XY</span></p>
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Parallel Lines

The lines that never intersect/cross

MN ∥ CD

<p>The lines that <strong><em>never </em></strong>intersect/cross</p><p>MN <strong>$$∥$$ </strong>CD</p>
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Bisect

Divide into 2 equal parts

<p>Divide into 2 <strong><em>equal</em></strong> parts</p>
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Segment Bisector

Line that cuts a segment exactly in half

Line bisects AB

<p>Line that cuts a <strong><em>segment </em></strong>exactly in half</p><p>Line bisects AB</p>
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Angle Bisector

Line that cuts an angle exactly in half

Line AD bisects <BAC

<p>Line that cuts an <strong><em>angle</em></strong> exactly in half</p><p>Line AD bisects &lt;BAC</p>
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Co linear

2 or more points on the same line

<p>2 or more points on the same line</p>
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Coplanar

2 or more points on the same plane

<p>2 or more points on the same plane</p>
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Postulate

A true statement taken without proof

<p>A true statement taken <strong><em>without proof</em></strong></p>
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Theorem

A true statement that needs to be proven before, use/taken only with proof

<p>A true statement that needs to be proven before, use/<strong><em>taken only with proof</em></strong></p>