Circles (Period 4)

Master circle concepts! Practice radius, diameter, circumference, and area calculations with this interactive worksheet.

Label the circle Click each of the 3 blue dots and label the part of the circle that it lies on.Your answers should be radius, diameter, and circumference.(Make sure you are spelling them correctly!) diameter circumference radius Fill in the blanks by clicking the appropriate words A circle's diameter is double the measure of the radius.A circle's radius is half of the measure of the diameter.All radii of the same circle are equal to each other. A circle has a diameter of 17 inches. What is the radius? 17 inches 8.5 inches 34 inches A circle has a radius of 25 centimeters. What is the diameter? 50 cm 25 cm 12.5 cm The measure of OC is 8 feet. Find the measure of AB. 8 feet 16 feet 4 feet The measure of AB is 33 inches. Find the measure of OC. 33 in 66 in 16.5 in Match the formulas Circumference = pi x diameter Area = pi x radius squared A circle has a diameter of 65 mm. Using 3.14 as an approximation for pi, find the circle's circumference. 204.1 mm 204.2 mm 102.05 mm A circle has a radius of 3 feet. Using 3.14 as an approximation for pi, find the circle's circumference. 9.42 feet 18.84 feet 4.71 feet A circle has a radius of 8 cm. Using the pi button, what is the circle's area rounded to the nearest hundredth? 804.25 201.06 25.13 A circle has a diameter of 42 meters. Using 22 as an approximation for pi, what is the circle's area? 132 5,544 1,386