This section is from the book "Bepler's Handy Manual of Knowledge And Useful Infomation", by David Bepler. Also available from Amazon: Bepler's Handy Manual of Knowledge and Useful Information.

Diameter of a circle multiplied by 3.1416 equals circumference. Radius of a circle multiplied by 6.283185 equals circumference. Square of the radius of a circle multiplied by 3.1416 equals area. Square of the diameter of a circle multiplied by 0.7854 equals area. Square of the circumference of a circle multiplied by 0.07958 equals area.

Half the circumference of a circle multiplied by half its diameter equals area.

Circumference of a circle multiplied by 0.159155 equals radius.

Square root of the area of a circle multiplied by 0.56419 equals radius.

Circumference of a circle multiplied by 0.31831 equals diameter.

Square root of the area of a circle multiplied by 1.12839 equals diameter.

Diameter of a circle multiplied by 0.86 equals side of inscribed equilateral triangle.

Diameter of a circle multiplied by 0.7071 equals side of an inscribed square.

Circumference of a circle multiplied by 0.226 equals side of an inscribed square.

Radius of a circle multiplied by 6.2832 equals circumference.

Circumference of a circle multiplied by 0.282 equals side of an equal square.

Diameter of a circle multiplied by 0.8862 equals side of an equal square.

Base of a triangle multiplied by one-half the altitude equals area.

Multiply both diameters and 0.7854 together equals area of an ellipse.

Surface of a sphere multiplied by one-sixth of its diameter equals solidity.

Circumference of a sphere multiplied by its diameter equals surface.

Square of the diameter of a sphere multiplied by 3.1416 equals surface.

Square of the circumference of a sphere multiplied by 10.3183 equals surface.

Cube of the diameter of a sphere multiplied by 0.5236 equals solidity.

Cube of the radius of a sphere multiplied by 4.1888 equals solidity.

Cube of the circumference of a sphere multiplied by 0.016887 equals solidity.

Square root of the surface of a sphere multiplied by 0.56419 equals diameter.

Square root of the surface of a sphere multiplied by 1.772454 equals circumference.

Cube root of the solidity of a sphere multiplied by 1.2407 equals diameter.

Cube root of the solidity of a sphere multiplied by 3.8978 equals circumference.

Radius of a sphere multiplied by 1.1547 equals side of an inscribed cube.

Square root of (1/3 of the square of) the diameter of a sphere equals side of inscribed cube.

Area of its base multiplied by 1/3 of its altitude equals solidity of a cone or pyramid whether round, square, or triangular.

Area of one of its sides multiplied by 6 equals surface of a cube.

Altitude of trapezoid multiplied by half the sum of its parallel sides equals area.

Square root of area of a circle multiplied by 3.54 equals circumference.

Radius multiplied by diameter of a circle multiplied by 1.57 equals area.

Number of degrees multiplied by radius multiplied by .0174 equals length of arc.

Square of diameter of sphere multiplied by .31416 equals convex surface.

Diameter of sphere multiplied by .806 equals dimensions of equal cube.

Diameter of sphere multiplied by .6667 equals length of equal cylinder.

Square inches multiplied by .00695 equals square feet.

Cubic inches multiplied by .00058 equals cubic feet.

Cubic feet multiplied by .03704 equals cubic yards.

Cylindrical inches multiplied by .0004546 equals cubic feet.

Cylindrical feet multiplied by .02909 equals cubic yards.

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