rectangle perimeter
2L + 2W
square perimeter
4s
triangle perimeter
a + b + c
circle circumference
2pier
rectangle area
L times W
square area
s square
triangle area
(1/2) bh
parallelogram area
bh
trapezoid area
1/2 (b1 + b2) h
circle area
pie r square
rectangular prism volume
L times W times H
cube volume
s cube
cylinder volume
pie r square h
rectangular prism surface area
2LW + 2LH + 2WH
cylinder surface area
2 pie r square + 2 pie rh
cube surface area
6s square
circle diameter
2r
circle radius
d/2
1 meter
100 cm
1 centimeter
10 mm