Circles: Radius, Diameter, and Circumference

Circle Terms (1min)

100

The distance from the center of a circle to the outside, also half of the diameter

What is radius

200

The longest line in a circle

What is the Diameter

300

What is the perimeter of a circle called?

Circumference

400

The total amount of space inside of a circle

What is the area?

500

3.14 or 22/7

What is pi?

Radius (1min)

100

The Diameter of this circle is 5ft

2.5ft

200

The diameter is 12ft

6ft

300

The diameter of this circle is 27in

13.5in

400

The diameter of this circle is 437m

218.5m

500

The diameter of this circle is 0.325in

0.1625in

Diameter (1min)

100

The radius of this is 5yds

10yds

200

The radius of this circle is 2.5m

5m

300

The circumference of this circle is 15.7ft

5ft

400

The circumference of this circle is 18.84cm

6cm

500

The diameter of this circle is 194.68m

62m

Circumference (3min)

100

The diameter for this circle is 10ft

31.4ft

200

The diameter for this circle is 13yds

40.82yds

300

The diameter of this circle is 25m

78.5m

400

The radius for this circle is 45ft

282.6ft

500

The Diameter for this circle is 3285mi

10314.9mi

Area (3min)

100

The radius of this circle is 2mi.

12.56mi²

200

The radius of this circle is 3yds.

28.26yds²

300

The radius of this circle is 21m.

1384.74m²

400

The radius of this circle is 240cm. 

180,956cm²

500

The radius of this circle is 500ft.

250,000ft²