Radius & Diameter
Circumference and Area
Arcs and Sectors
Circles in the real world
US History
100
The diameter is 10 inches. Find the radius.
What is 5 inches.
100
A circle has a diameter of 12.5 inches. What is the circumference in terms of
pi
?
What is 12.5pi inches?
100
A circle has an area of 12 ft squared. It is cut into 4 equal pieces. What is the area of each sector?
What is 3 ft2.
100
A bicycle wheel has a radius of 1 foot. If the bicycle wheel rotates one time, what distance is travelled?
What is 2pi or 6.28 feet.
100
Who was the first President of the United States?
George Washington
200
The diameter is 25 feet. Find the radius.
What is 12.5 feet.
200
A circle has a diameter of 25 inches. What is the circumference rounded correctly to 2 decimals?
What is 78.54 inches
200
A circle has a circumference of 22 feet. It is cut into 10 equal pieces. What is the length of each of the ten arcs?
What is 2.2 ft.
200
A large Jeep has a tire with a radius of 18 inches. Find the circumference of the wheel.
What is 36pi or 113.04 inches
200
What year did the US declare independence from England?
1776
300
The circumference of the circle is 56.52 or 18pi.
Find the radius.
What is 9 inches
300
A circle has a radius of 50 miles. What is the area of the circle TO THE NEAREST MILE?
What is 7854 mi2.
300
A pizza is 16 inches long (the diameter). The pizza is cut into 8 pieces. What is the length of crust (circumference) on each piece? You can put the answer in terms of pi
What is 2pi in?
300
Matt 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 in terms of pi?
What is 27pi in2. or 84.78 in2
300
What country did the US buy the 'Louisiana Purchase' from?
France
400
The area of this circle is
25pi
Find the radius.
What is 5 inches.
400
A circle has a diameter of 16. Find the area in terms of pi.
What is 64 pi
400
A pizza is 16 inches long (diameter). It is cut into 4 pieces. Jane eats 3 of the pieces. What is the area of pizza she is eating?
What is 48 pi in2
400
John owns a circular pool in his back yard. If he swims around the pool, he swims 30pi meters. What is the radius of this circle?
What is 15 meters.
400
What happened on December 7th, 1941?
Pearl Harbor attack, the US declares war on Japan and enters WWII.
500
A circle has an area of
256pi cm2.
Find the diameter.
What is 32cm
500
A circle has a circumference of
6pi
.
What is the area?
What is 9pi?
500
What is the area of the shaded region in terms of pi?
What is 12pi or 37.68
500
A pizza with a diameter of 22 inches cost $28. How much does one square inch of pizza cost?
What is $0.074 per square inch
500
What year did women in the US gain the right to vote?
1920