Circles: Radius, Diameter, and Circumference

Circle Terms

100

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

What is radius

200

The length from one edge to the other edge of a circle

What is the Diameter

300

The outside measurement of a circle.

What is the circumference?

400

The total amount of space inside of a circle

What is the area?

500

3.14 or 22/7

What is pi?

Finding Radius(find the radius for all)

100

The Diameter of this circle is 5 cm

What is 2.5 cm

200

The diameter is 12 cm

What is 6 cm

300

The diameter of this circle is 27 m

What is 13.5 m

400

The diameter of this circle is 437 m

What is 218.5 cm?

500

The diameter of this circle is 0.325 m

What is 0.1625 m

Finding Diameter (Find Diameter for all)

100

The radius of this is 5 km

What is 10 km

200

The radius of this circle is 2.5 m

What is 5 m

300

The circumference of this circle is 15.7 cm

What is 5 cm

400

The circumference of this circle is 18.84 cm

What is 6 cm

500

The diameter of this circle is 194.68 cm

What is 62 cm

Finding Circumference(Find Circumference for all)

100

The diameter for this circle is 10 cm

What is 31.4 cm

200

The diameter for this circle is 13 mm

What is 40.82 mm

300

The diameter of this circle is 25 m

What is 78.5 m

400

The radius for this circle is 45 cm

What is 282.6 cm

500

The Diameter for this circle is 3285 mm

What is 10 314.9 mm

Finding Area(Find area for all)

100

The radius of this circle is 2

What is 12.56 cm²

200

The radius of this circle is 3 cm

What is 28.26 cm²

300

The radius of this circle is 21 cm

What is 1384.74 cm²

400

The diameter of this circle is 10 cm. 

What is 78.5 cm²

500

The diameter of this circle is 18.62 cm.

What is 273 cm²