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GENERAL MATH FORMULA

AREA FORMULAS

  • CIRCLE:

  • pr2     (p=constant=3.142(approx), and r = radius)

  • RECTANGLE:

  • ab   (a = width and b = height of rectangle)

  • SQUARE:

  • a2       (a = width  = height of square, all sides equal)

  • TRIANGLE:

1/2(bh)    (b = base width  and h = height of triangle)

SURFACE AREA

  • CYLINDER:
2p(r2 + rh)       (p=constant=3.142(approx), r = radius, h = height)

  • CUBE:
6a2   (a=length of each side of the cube)

    

  • RECTANGULAR PRISM:
2(ab + ac + bc)  (a, b, and c are the lengths of the 3 sides)

VOLUME FORMULAS

  • SPHERE:
4pr2     (p=constant=3.142(approx), and r = radius)

  • CONE:
1/3pr2h        (p=constant=3.142(approx), r = radius, h = height)

  • CUBE:
a3 (a = length = width  = height of square, all sides equal)

  • CYLINDER:
pr2h        (p=constant=3.142(approx), r = radius, h = height)

  • PYRAMID:
1/3(bh)    (b = base width  and h = height of pyramid)

  • RECTANGULAR PRISM:
abc       (a = length, b = width and c = height of rectangular prism )

  • PERIMETER:

  • CIRCLE:
pd  or 2pr   (p=constant=3.142(approx), d = diameter and r = radius)

  • SQUARE:
4a or  a + a + a +a     (a = length of each side of square )

  • RECTANGLE:
2(a + b) or  a + b + a + b     (a = length, b = height of rectangle)
Last updated 1-13-09