Circles, Circles, Circles!

Circle Terms

100

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

Radius

200

The longest part in a circle. From one edge to the other through the center. 

Diameter

300

The distance around the circle.

Circumference

400

The total amount of space inside of a circle

Area?

500

3.14 or 22/7

Pi

Finding Radius

100

The Diameter of this circle is 5cm

2.5cm

200

The diameter is 12m

6m

300

The diameter of this circle is 27cm

13.5cm

400

The diameter of this circle is 437m

218.5m

500

The diameter is 24mm

12mm

Finding Diameter

100

The radius of this is 5cm

10cm

200

The radius of this circle is 2.5cm

5cm

300

The radius of this circle is 15.7m

31.4m

400

The circumference of this circle is 18.84m

6m

500

The circumference of this circle is 194.68cm

62cm

Finding Circumference

100

The diameter for this circle is 10cm

31.4cm

200

The diameter for this circle is 13cm

40.82cm

300

The diameter of this circle is 25m

78.5m

400

The radius for this circle is 45cm

282.6cm

500

The radius is 12.5m

78.5m

Finding Area

100

The radius of this circle is 2cm

12.56cm

200

The radius of this circle is 3cm

28.26cm

300

The radius of this circle is 21m

1384.74m

400

The diameter is 30cm

706.5cm

500

The circumference is 25.12m

50.24m