Radius & Diameter
Circumference and Area
Circles in the real world
Composite figures
100
The diameter is 10 inches. Find the radius.
5 inches.
100
A circle has a diameter of 12.5 inches. What is the circumference?
39.25 in
100
A bicycle wheel has a radius of 1 foot. If the bicycle wheel rotates one time, what distance is travelled?
6.28 feet.
100
Find the perimeter.
10.28 in
200
The diameter is 25 feet. Find the radius.
12.5 feet.
200
A circle has a diameter of 25 inches. What is the circumference?
78.50 inches
200
A large car has a tire with a radius of 18 inches. Find the circumference.
113.04 inches
200
Find the area.
73.12 in2
300
The circumference of the circle is 56.52
Find the radius.
9 inches
300
A circle has a radius of 50 miles. What is the area of the circle to the nearest mile?
7850 mi2.
300
Trice is learning to drive a car. The steering wheel in his car has a radius of 9 inches. His instructor says "Place your hands at 10 and 2." (1/3 of the circle) What is the area of the sector formed?
84.78 in2
300
Find the shaded area.
13.76 ft2
400
The area of a circle is 78.5 in2. What is its radius?
5 inches.
400
A circle has a diameter of 15 in. Find the area.
176.63 in2
400
Robbie owns a circular pool in his back yard. If he swims around the pool, he swims 94.2 meters. What is the radius of the pool?
15 meters.
400
find the area and perimeter of the shape.
area = 636 cm2
perimeter = 84.78 cm500
A circle has an area of 803.84 cm2
Find the diameter.
32cm
500
A circle has a circumference of 21.038 mm. What is its area?
35.24 mm2
500
A pizza with a diameter of 22 inches cost $28. How much does one square inch of pizza cost?
$0.07
500
Find the area.
122.05 cm2