Pre Unit Angle basics

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Last updated 3:20 PM on 9/18/26
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12 Terms

1
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angle

the space between two intersecting rays, usually measured in degrees,

<p>the space between two intersecting rays, usually measured in degrees,</p>
2
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perpendicular

2 lines intersecting to form a 90 degree (right) angle

<p>2 lines intersecting to form a 90 degree (right) angle</p>
3
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parallel

2 lines in the same plane that do not intersect (are equidistant from each other)

<p>2 lines in the same plane that do not intersect (are equidistant from each other)</p>
4
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right angle

an angle that measures 90 degrees

<p>an angle that measures 90 degrees</p>
5
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Straight angle

an angle that measures 180 degrees

<p>an angle that measures 180 degrees</p>
6
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acute angle

an angle that measures less than 90 degrees

<p>an angle that measures less than 90 degrees</p>
7
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obtuse angle

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

<p>An angle that measures more than 90 degrees but less than 180 degrees</p>
8
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complementary angles

two angles whose measures have a sum of 90 degrees

<p>two angles whose measures have a sum of 90 degrees</p>
9
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supplementary angles

two angles whose measures have a sum of 180 degrees

<p>two angles whose measures have a sum of 180 degrees</p>
10
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adjacent angles

two angles that share a common vertex and side, but have no common interior points

<p>two angles that share a common vertex and side, but have no common interior points</p>
11
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vertex

The common endpoint of an angle

<p>The common endpoint of an angle</p>
12
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intersecting lines

lines that cross at one point

<p>lines that cross at one point</p>