Radius
Diameter
Circumference
Area
SUPER DIFFICULT
100

Draw a circle with a radius.

100

Draw a circle with a diameter.

100

Find the circumference if the radius is 6 km.

About 38 km.

100

Find the area of a circle with a radius of 12 mm.

About 452 square mm.

100

Radius and Circumference are proportional. True or False?

True. Constant is 2 pi.

200

What is the radius if the diameter is 586 mm

293 mm

200

Find the diameter if the radius is 72 yds.

144 yds

200

Find the circumference if the diameter is 44 cm.

About 138 cm.

200

Find the area of a circle with a diameter of 50 ft.

About 1963 square ft.

200

What is the perimeter of this shape?

About 92.8 cm

300

What is the radius if the circumference is 18.8 in?

About 3 in

300

Find the diameter if the circumference is 270 ft.

About 86 ft

300

Find the circumference of this shape. 

About 19 in.

300

Find the area of this shape. 

About 38 square inches.

300

Radius and area are proportional. True or false?

False. 

400

What is the radius if the circumference is 542 mi?

About 86 mi

400

Find the diameter if the circumference is 201 m.

About 64 m.

400

Find the circumference of this shape with a diameter of 5 ft.

About 8 ft.

400

Find the area of this shape with a diameter of 11 yds. 

About 47 square yards. 

400

How many rotations does the tire need to do in order to travel 13,200 ft?

About 200 rotations.

500

What is the radius if the circumference is 1256 m2?

About 200 m

500

Find the circumference if the area is 113.04 square feet.

About 36 ft

500

Find the circumference if the area is 78.5 square inches.

About 31.4 in.

500

Find the area if the circumference is 50.24 mm.

About 201 square millimeters.

500

DAILY DOUBLE!!

Write the answer on a piece of paper with your point wager. 

A goat is tied to a 6 foot rope. It travels around all day eating up all the grass. Now the farmer needs to plan new grass seed. Each bag of grass seed covers about 4ft2. Each bag of grass seed costs $23. How much is the farmer going to have to pay in order to spread grass seed on the now muddy circle?

$667 because the area needed to cover is about 113ft2. The farmer would need 29 bags in order to cover all of the area and would have seed left over. 29 bags costs $667.