Radius & Diameter
The diameter is 10 inches. Find the radius.
What is 5 inches.
A circle has a diameter of 12.5 inches. What is the circumference in terms of pi?
What is 12.5pi inches? or 39.25
If you know the diameter, how do you find the radius?
What is "divide by 2"?
A bicycle wheel has a radius of 1 foot. What is the diameter?
2 ft
The diameter is 25 feet. Find the radius.
What is 12.5 feet.
A circle has a diameter of 25 inches. What is the circumference rounded correctly to 2 decimals (no pi in the answer)?
What is 78.54 inches
2*pi*r
A large Jeep has a tire with a radius of 18 inches. Find the circumference of the wheel.
What is 36pi?
or 113.04
The diameter of a circle is 18 inches. Find the radius.
What is 9 inches.
A circle has a radius of 50 miles. What is the area of the circle TO THE NEAREST MILE?
What is 7854 miles squared.
Area of a circle
What is pi*r^2?
Matt is learning to drive a car. The steering wheel in his car has a radius of 9 inches. What is the circumference of the wheel?
What is 56.52 in?
The radius of this circle is 10 inches squared. Find its diameter.
What is 20.
A circle has a diameter of 16. Find the area in terms of pi.
What is 4(y^2)pi
Finding radius when given circumference
C/2pi = r
John owns a circular pool in his back yard. If he swims around the outer edge of the pool, he swims 30pi meters. What does this measure??
What is the circumference.
A circle has a diameter of 1000 cm. Find its radius.
What is 500 cm.
A circle has a radius of 10 cm. What is it area?
What is 314 sq cm?
pi * r squared
What is the area of a circle?
A circle has a diameter of 28 inches. What is the area of the circle?
What is 615.44 sq in?