Geometry Formula's

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Last updated 6:08 PM on 8/18/26
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16 Terms

1
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Sum of a Triangles Angles

180

2
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Sum of a Polygons Angles

(n-2) x 180

3
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Complementary Angles

are equal to 90 degrees

4
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Supplementary Angles

Are equal to 180 degrees

5
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Perimeter of a Rectangle

P= 2L +2W

6
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Perimeter of a Square

P= 4s

7
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Area of a Rectangle

A= L x W

8
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Area of a Square

A= s²

9
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Area of a Triangle

A= 1/2(bh)

10
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Area of a Circle

A= π r²

11
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Area of a Trapezoid

A= ½ (B1 + B2)h

12
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Circumference

C= π x d
C= π x r2

13
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Volume of a Rectangular Solid

V= LWH

14
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Volume of a Cube

V=s3

15
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Volume of a Cylinder

V= π r2h

16
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Distance Formula

d=√[(x₂−x₁)² + (y₂−y₁)²]