GENERAL MATH FORMULAS

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)

• SPHERE:

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

VOLUME FORMULAS

• CUBE:

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

• CONE:

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

• 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)