GEOMETRIC FORMULAS
Geometric Formulas
CIRCLE
Area = Square of Diameter X .7854 or Square of Radius X 3.1416 Circumference =Diameter X 3.1416 Diameter = Circumference X .3183
Doubling diameter increases area four times; tripling diameter increases area nine times, etc.
SQUARE
Area = Square of Side Diagonal = Side X 1.4142 Side =Diagonal X .7071
SQUARE INSCRIBED IN CIRCLE
Side of Square =Diameter of Circle X .7071 or Circumference of Circle X .2251 Diameter of Circle = Side of Square X 1.4142
Circumference of Circle = Side of Square X 4.4429
SQUARE & CIRCLEWITH EQUAL AREA
Side of Square =Diameter of Circle X .8862 Diameter of Circle = Side of Square X 1.128 Circumference of Circle = Side of Square X 3.545
RECTANGLE
Area = Length XWidth Diagonal = Square root of sumof squares ofWidth and Length
TRIANGLE
Area = Base X 1/2 of Perpendicular Height
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