Circle Vocabulary
a straight line segment that passes through the center of the circle and touches both edges of a circle
diameter
A fountain has a radius of 6 ft. What is the area?
113.04 ft2
The diameter of a barn is 10 m. What is the circumference?
31.4 m
The diameter is 10 ft.
5 ft
A circular sandbox has a diameter of 14 ft. Sand costs $2.10 per square foot. What is the total cost to fill the sandbox?
$323.11
radius
A pool has a diameter of 10 m. What is the area?
78.5 m2
The radius of a circle is 4 inches. What is the circumference of the circle?
25.12 inches
The circumference of a circle is 40*pi inches. What is the radius?
20 inches
A circular garden has a radius of 5 ft. Soil costs $5.20 per square foot. How much will it cost to fill the garden?
$408.20
the distance around the circle
circumference
A button has a radius of 3 cm. What is its area?
28.26 cm2
The diameter of a well is 4ft. What is the circumference?
12.56 feet
The diameter of a pond is 70 ft. What is the radius?
35 ft
A circular rug has a diameter of 10 ft. If each square foot of the rug costs $6.75, how much will the entire rug cost?
$339.12
the amount of space inside the circle
area
A table has a diameter of 18 in. What is the area of the table?
254.34 in2
The radius of a basketball hoop is 5 inches. What is the circumference of the hoop?
31.4 inches
The circumference of a circle is 88*pi meters. What is the radius?
A circular playground has a diameter of 40 ft. Rubber surfacing costs $8.25 per square foot. What is the total cost of the surfacing?
$10,362.00
The ratio of a circle's circumference to its diameter.
pi
A playground has a diameter of 20 ft. What is the area?
314 ft2
The circumference of a pool is 10*pi ft. Using 3.14 for pi what is it's circumference?
31.4 ft
The circumference of a circle is 70pi meters. What is the radius?
35 meters
A giant circular pizza has a diameter of 28 inches. If toppings cost $0.09 per square inch, what is the cost of the toppings?
$55.39