Baguswte

Determine the circumference of a circle without calculations These rulers have an inch scale for measuring diameter on the top edge and the corresponding circumference scale on the bottom edge They're also known as tinners' rules All are flexible for measuring slightly curved surfaces and have wearresistant etched markingsCIRCUMFERENCE the edge of a circle or the distance around a circle DIAMETER the width of a circle (through center) RADIUS 1/2 of the diameter, or the distance from the center to the edge (circumference)If the tape measure is divided in inches, multiply the measured circumference by 254 for centimeters or 254 for millimeters For cyclecomputers that require a diameter value, divide the result by (π), and for those which require a radius value, divide the Geometry 1 3/4 inch diameter to circumference