Circle Jeopardy!

Circle Terminology

100

The formula to calculate Area. 

A=πr2

200

The formula to calculate circumference.

C=πd

300

Formula to calculate diameter.

D=r²

400

Definition of circumference.

Circumference is the size around the circle.

500

Definition of area.

Area is the size of the inside of the circle.

Working Backwards

100

Radius of a circle with a circumference of 16cm.

2.54cm

200

Diameter of a circle with a circumference of 40cm.

12.73cm

300

Diameter of a circle with a circumference of 69cm.

21.97cm

400

Circumference of a circle with a diameter of 420mm.

1318.8mm

500

Area of a circle with a circumference of 54cm.

232.16cm

Area

100

D=20, A=?

A=314

200

R=19, A=?

A=1133.54

300

R=69, A=?

A=14949.54

400

D=58, A=?

A=2640.74

500

C=67, A=?

A=357.40

Circumference

100

R=3, C=?

C=18.84

200

D=10, C=?

C=31.4

300

R=23, C=?

C=144.44

400

D=82,C=?

C=257.48

500

D=72, C=?

C=226.08

Word Problems

100

- DAILY DOUBLE -
If Jenna makes a cookie with a radius of 12cm, what is the area of her cookie?

452.16cm

200

If Jordan makes a batch of cupcakes, and they have a diameter of 5, what is the circumference of one of his cupcakes?

15.7cm

300

If Hubert Blaine Wolfeschlegelsteinhausenbergerdorff buys a gold coin with a diameter of 43mm, what is the circumference of that coin?

139.32mm

400

If I have a watermelon with a radius of 14cm, what is the area of that watermelon?

615.44cm

500

If I give you a wheel with a diameter of 3.14in, what's the area?

7.73in