Geometry Formulas Flashcards by Nicole Kerkhof

Q

Area of Circle

A

A=πr2

Pi radius squared (power of two)

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Q

Circumference of a Circle

A

C=2πr

C = πd

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Q

Area of a Square

A

A = s2

side squared (power of two)

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Q

Perimeter of a square

A

P=4s

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Q

Area of a rectangle

A

A=lw

A=bh

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Q

Perimeter of a rectangle

A

P=2(l+w)

P=2l+2w

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Q

Area of a triangle

A

A=bh/2

Base x height divide by 2

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Q

Perimeter of a triangle

A

P = add all sides

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Q

Area of a trapezoid

A

A=(b1+b2)/2

base one + base two then divide by 2

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Q

What is pi?

A

3.14

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