Circle Jeopardy

Formulas

100

What is the number for π (Pi)

3.14

200

How do you find Radius when given Diameter? 

r=d/2

300

What is the formula for Circumference when given Diameter 

C=π d

400

What is the formula for Circumference when given Radius

C=2π r

500

What is the formula for Area of a circle

A=π r²

Circumference

100

What is the circumference of a circle with a radius of 3?

18.84

200

What is the approximate circumference of a circle with a radius of 5 in.?

31.4 in

300

https://docs.google.com/presentation/d/1RVaQYO1s2qv_kvkB7h2O14b_dZS_2l_luNkDfOKXMjs/edit?slide=id.g3ce269de638_0_167#slide=id.g3ce269de638_0_167

C. 88 mm

400

https://docs.google.com/presentation/d/1RVaQYO1s2qv_kvkB7h2O14b_dZS_2l_luNkDfOKXMjs/edit?slide=id.g3ce269de638_0_188#slide=id.g3ce269de638_0_188

942 ft

500

https://docs.google.com/presentation/d/1RVaQYO1s2qv_kvkB7h2O14b_dZS_2l_luNkDfOKXMjs/edit?slide=id.g3ce269de638_0_172#slide=id.g3ce269de638_0_172

19 Units

Area

100

A circle has a radius of 6.2 inches. What is the approximate area of the circle?

A=120.7 in²

200

https://docs.google.com/presentation/d/1RVaQYO1s2qv_kvkB7h2O14b_dZS_2l_luNkDfOKXMjs/edit?slide=id.g3ce269de638_0_177#slide=id.g3ce269de638_0_177

38.465 cm²

300

https://docs.google.com/presentation/d/1RVaQYO1s2qv_kvkB7h2O14b_dZS_2l_luNkDfOKXMjs/edit?slide=id.g3ce269de638_0_162#slide=id.g3ce269de638_0_162

113 ft²

400

Justin bought a circle rug with a diameter of 7 feet. What is the approximate area of a rug? 

38.47 feet²

500

Lauren makes a circular tablecloth for her 48-inch diameter table. The tablecloth hangs over the edge of the table 6 inches all the way around. What is the approximate area of the tablecloth?

A. 1,385 square inches B. 1,810 square inches        C. 2,290 square inches D. 2,827 square inches  

D. 2,827 square inches

Word Problems

100

One of the Largest pizzas ever made had a diameter of 80 yards. What is the area of this pizza to the nearest whole number?

5024 Square Yards

200

The diameter of a wheel from a bicycle is 66 cm. About how far will the wheel travel in one complete turn?

207 cm

300

A circle has a diameter with endpoints at (0, 4) and (0, -8). What is the approximate area of the circle?

113 units²

400

A circle has its center at  (7, 0). The radius of the circle extends to the point (-1, 0). What is the approximate circumference of the circle?

50.24

500

Susie is building a circular table with a diameter of 2 feet. She wants to put a trim around the edge of the table. She can buy trim in WHOLE feet lengths only. Which is the least amount of trim Susie can buy and still have enough to go around the edge of the table?

7 feet

Random Circles

100

How far will the wheel travel in one complete turn?

AREA OR CIRCUMFERENCE

Circumference

200

Around the Edge

AREA OR CIRCUMFERENCE

CIRCUMFERENCE

300

A circular lake has a circumference of 24 miles. To the nearest square mile what is the area of the lake?

46 square miles

400

https://docs.google.com/presentation/d/1RVaQYO1s2qv_kvkB7h2O14b_dZS_2l_luNkDfOKXMjs/edit?slide=id.g3ce269de638_0_157#slide=id.g3ce269de638_0_157

59 Meters²

500

A spinner travels around in a circle. The radius of the spinner is 3 inches. Mike spins the spinner and it travels completely around the circle 5 times. About how far did the tip of the spinner travel?

A. 15 inches B. 30 inches C. 95 inches D. 140 inches  

C.95