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Circle Terms
Finding Radius
(find the radius for all)
Finding Diameter (Find Diameter for all)
Finding Circumference(Find Circumference for all)
Finding Area
(Find area for all)
100
The distance from the center of a circle to the outside, also half of the diameter
What is radius
100

The Diameter of this circle is 5 yards. What is the radius?

2.5 yards

100

The radius of this is circle is 5 m. What is the diameter?

10 m

100

The diameter for this circle is 10 units. What is the circumference?

31.4 units. 
100

The radius of this circle is 2 cm. What is the area? 

12.56 square cm

200

The longest chord (line) in a circle

What is the Diameter

200

The diameter is 18 inches. What is the radius?

9 inches

200

The radius of this circle is 2.5 cm. What is the diameter?

5 cm

200

The area of this circle is 182.25𝝅 yards2. What is the circumference? Round to the nearest tenth 

84.8 yards

200

The radius of this circle is 3 mm. What is the area? 

28.26 square mm

300

The perimeter of a circle.

What is a circumference? 

300

The circumference of this circle is 37.68 m. What is the radius?

6 m

300

The circumference of this circle is 15.7 ft. What is the diameter?

5 ft

300

The area of a wheel is 254.34 square inches. What is the circumference?

56.52 inches

300

The diameter of this circle is 41 km. What is the area? Round to the nearest tenth

1319.6 square km

400
The total amount of space inside of a circle
What is the area?
400

The circumference of a circle is 301.44 feet. What is the radius? 

48 feet

400

The area of this circle is 306.25𝝅 yards2. What is the diameter? 

35 yards

400

A bicycle tire has a radius of 13 1/4  inches. How many feet will the bicycle travel in 40 rotations of the tire? Round to the nearest tenth.

277.4 feet

400

The circumference of a circle is 34.54 ft. What is the area to the nearest tenth? 

95 square feet

500

what is the fraction for pi in simplest form?

22/7

500

A wheel traveled 653.12 inches after rotating 13 times. What is the wheel's radius?  

8 inches

500

A wheel travels 65.94 feet after rotating 3 times. What is the wheel's diameter? 

7 feet

500

Two identical wheels are placed along a straight path.  The centers of the wheels are 9.31 meters apart. The radius of each wheel is 3.5 centimeters.  The wheels start rolling towards each other at the same speed making one full revolution per second.  How long does it take the wheels to collide? 

about 21 seconds

500

John has a circular garden in his backyard with a fence around it that is a circle.  The fence is 45 ½ feet long.   If he uses 2 teaspoons of fertilizer for every 25 square feet of garden, how many teaspoons will John need for his entire garden? Round to the nearest tenth

13.2 teaspoons