1

Pi (π)

3.14

2

Circumference of a circle

πd (3.14 x diameter)

3

Area of a circle

πr2 (3.14 x radius squared)

4

Perimeter of a square

side + side + side + side

4s

5

Area of a square

s2

s x s

6

Perimeter of a rectangle

2length + 2width

l + l + w + w

7

Area of a rectangle

lw

l x w

8

Perimeter of a triangle

s + s + s

9

Area of a triangle

1/2 base x height

bh/2

10

Surface area of a cylinder

2πr2 (2 x 3.14 x radius squared) + 2πrh (2 x 3.14 x radius x height)

11

Volume of a cylinder

πr2h (3.14 x radius squared x height)

12

Surface area of a rectangular prism

2(lw) + 2(lh) + 2(wh)

13

Volume of a rectangular prism

lwh

l x w x h

14

Volume of a cone

1/3 πr2h (3.14 x radius squared x height)