Chapter 8 jeopardy

8.1

100

What is the radius of a circle with a diameter of 20in?

10in

200

what is the diameter of a circle with a radius 4ft

8ft

300

find the circumference of a circle with a radius of 2cm

12.56cm

400

find the circumference of a circle with a diameter of 9cm

28.26cm

500

what is the circumference of a circle with a radius of 18mm?

113.04mm

8.2

100

A hula hoop has a radius of 4ft. What is the distance around it (in terms of π)

8π ft

200

A circular pond has a diameter of 12 m. How far is it around? 

12π m

300

A tire travels one full rotation and goes 62.8 inches. What is its diameter?

20 in

400

The circumference of a circle is 18π. What is the radius?

9

500

A circle's radius is cut in half. What happens to the circumference? 

It is cut in half.

8.3

100

A coin has a radius of 2 cm. What is its area (in terms of π)?

4π cm²

200

A circular rug has a diameter of 10 ft. What is its area?

25π ft²

300

A circle has a radius of 8 in. Find the area (use 3.14).

200.96 in²

400

The area of a circle is 49π. What is the radius?

7

500

If the radius of a circle is tripled, how does the area change.

it becomes 9 times larger

8.4

100

Find the area: 

Semi circle: Diameter: 4yd use 3.14 for pi.

Triangle: Base: 53yd height: 13yd

350.78yd squared

200

Find the area:

circle with a radius of 6mm

Rectangle with a length of 9mm and a width of 4mm

73.68mm squared

300

find the area:

Semicircle 1: diameter of 13cm

semicircle 2: radius of 6.5cm

triangle: base of 8cm, height of 11cm

84.82cm squared

400

Find the area:

Rectangle with a length of 16yd, and a width of 5yd

Triangle with a base of 14yd and a height of 20yd

220yd squared

500

Find the area:

Triangle: b: same as the semi circle diameter h: 12 yd

Semi circle: diameter: 5 yd

37.85 yd.

Word problems

100

If the diameter of janes pie is 4in, what it the radius?

2in

200

If the radius of a pizza pie is 16, what is the diameter?

32

300

If you have a pizza tray with the diameter of 184, what is the radius?

92

400

what is the circumference of a circle with a diameter of 6?

18.84

500

Kevin wants to know how to find out the circumference of a pie but does not know the diameter. He knows the radius of the pie is 5. Find the diameter and circumference of the pie

diameter is 10 and the circumference is 31.4