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math test facts

things I need to know for the math test

square perimeter length + length + width + width
area of a square length . width
perimeter of a triangle add all sides
area of triangle 1/2 . base . height
the diameter is what times the radius 2 times the radius
radius half of the diameter
circumference of a circle C= 2 pi/ times radius
circumference when diameter is given first c=d pi
Area of a circle pi radius to the second power= r times 2 pi
trapezoid area 1/2 height times base1 and base2
Created by: bub