Measurement Formulas

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Measurement Formulas
A graphical list of the formulas for measurement concepts. Print this page for
reference.
Shapes
Formula
Rectangle:
Area = Length X Width
A = lw
Perimeter = 2 X Lengths + 2 X Widths
P = 2l + 2w
Parallelogram
Area = Base X Height
a = bh
Triangle
Area = 1/2 of the base X the height
a = 1/2 bh
Perimeter = a + b + c
(add the length of the three sides)
Trapezoid
Perimeter = area + b1 + b2 + c
P = a + b1 + b2 + c
Circle
The distance around the circle is a
circumference. The distance across the circle is
the diameter (d). The radius (r) is the distance
from the center to a point on the circle. (Pi =
3.14)
d = 2r
c = pd = 2 pr
2
A = pr
(p=3.14)
Rectangular Solid
Volume = Length X Width X Height
V = lwh
Surface = 2lw + 2lh + 2wh
Prisms
Volume = Base X Height
v=bh
Surface = 2b + Ph (b is the area of the base P is
the perimeter of the base)

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