Geometry

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geometry basics

Last updated 1:46 AM on 8/27/26
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7 Terms

1
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adjacent angles

two angles that share a common side and vertex

“next to“ each other

2
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vertical angles

two angles directly across from each other on intersecting lines.

always congruent!

3
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complementary angles

two angles with measures that have a sum of 90 degres

do not have to be adjacent

4
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supplementary angles

two angles with measures that have a sum of 180

5
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linear pairs

adjacent angles that are supplementary combined they create a straight line

6
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perpendicular

two lines that intersect at a 90 degres (right) angle symbol

7
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angle bisector

a line or ray divider an angle into two equal parts