Circles

Area Of Circles

100

17²x3.14

907.46

200

5²*3.14

78.5

300

38²*3.14

4534.16

400

6²*3.14

113.04

500

5555²*3.14

96894198.5

Circumference Of Circles

100

6*3.14

18.84

200

8*3.14

279.46

300

12*3.14

37.68

400

28*3.14

87.92

500

674*3.14

2116.36

Random facts

100

What Is pi

3.14

200

Is Radius the same as diameter  

No

300

What is the formula for the area of a circle

^R2*3.14

400

What is the 3d shape of a circle 

sphere

500

Is a circle 360* around 

yes 

Word Problems

100

Rio is running laps around a circular track. If the circle has a diameter of 43 yards, what is the circumference of the track?

135.02

200

Allen is building a fence around a circular lot that has a radius of 39 feet. Each foot of fencing costs $10. How much will the circular fence cost Allen? Round to the nearest dollar.

$245

300

Investigators are surrounding a crime scene with barricade tape that says "Do Not Cross". The crime scene is in the shape of a circle with a radius of 25  meters. How many meters of tape will the investigators need to completely encircle the crime scene? Round your answer to the nearest tenths place.

157

400

A lawn sprinker rotates in a full circle in order to water all the grass around it. If the water stream from the sprinkler can reach out 2 feet, how large is the area of grass that the sprinkler covers? Round your answer to the nearest tenths place

12.56

500

Allison is practicing archery by shooting a bow and arrow at a circular target. If the diameter of the target is 14 feet, how large is the total area in which Allison can land a shot? Round your answer to the nearest tenths place.

615.44

Part of a circles

100

From the middle of a circle to one side of circle

radius 

200

Around the circle

circumference

300

From the middle to both side of a circle

dimeter 

400

The inside of a circle 

area

500

What is NOT a part of a circle

A perimeter

B chord

C radius

D diameter

A Perimeter