To find the circumference of a circle in lineal feet, multiply the diameter in inches by .2618

To find diameter of a circle, you multiply the circumference by .31831.

To find the area of a circle, multiply square of diameter by .7854.

Doubling the diameter of a circle increases its area four times.

Area of rectangle, length multiplied by breadth.

To find area of a triangle multiply base by 1/2 perpendicular height.

To find surface of a ball multiply square of diameter by 3.1416.

To find side of an inscribed square multiply diameter by 0.7071, or multiply circumference by 0.2251, or divide circumference by 4.4428.

To find side of an equal square multiply diameter by .8862.

Square ? A side multiplied by 1.4142 equals diameter of its circumscribing circle.

A side multiplied by 4.443 equals circumference of its circumscribing circle.

A side multiplied by 1.128 equals diameter of an equal circle.

A side multiplied by 3.547 equals circumference of an equal circle.

Square inches multiplied by 1.273 equals inches of an equal circle. To find cubic inches in a ball multiply cube of diameter by .5236.

To find cubic contents of a cone multiply area of base by 1/3 the altitude.

To find weight per lineal foot of tubing or pipe: outside diameter minus wall thickness multiplied by wall thickness x 10.68.

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