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Geometry Formulas
Using forumlas to find area and perimeter of geometric shapes
8
Mathematics
7th Grade
01/22/2011
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Cards

Term
Area of a triangle
 Definition
A = 1/2 bh
Term
Area of a rectangle
 Definition
A = lw
Term
Area of a parallelogram
 Definition
A = bh
Term
Area of a square
 Definition

A = s • s

 

A = s2
Term
Perimeter of a rectangle
 Definition
P = l + w + l + w
P = 2(l + w)
Term

 

circumference of a circle

 Definition

 

 

C ≈ ∏d

C≈ 2r∏

 
Term

 

Area of circle

 Definition

 

 

A ≈ ∏r2

 

A ≈ ∏•r•r
Term
Area of a trapezoid
 Definition

 

A = 1/2(b1 + b2)h
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