Circle Terms
Radius
Diameter
Circumference
Area
100

The distance around the circle.

What is Circumference

100

The diameter is 5cm

What is 2.5cm

100

The radius is 8m

What is 16m

100

The diameter is 34 in

What is 106.8 in

100

The radius is 4in.

What is 50.265 in2

200

A straight line through the center of the circle.

What is Diameter

200

The diameter is 8.234 m

What is 4.117m

200

The radius is 5.68cm

What is 11.36cm

200

The diameter is 12.2 cm

What is 38.327 cm

200

The radius is 12mm

What is 452.389mm2

300

The space inside the circle

What is area
300

The diameter is 19+1/2 dm

What is 9.75 OR 9 + 3/4 dm

300

The radius is 1/5 ft

What is 0.4 ft OR 2/5ft

300

The radius is 6.164m

What is 38.729m

300

The diameter is 17ft

What is 226.98 ft2
400

A straight line from the middle of the circle to an outer edge.

What is radius

400

The circumference is 37.7cm

What is 6cm

400

The circumference is 175.929 mm

What is 56 mm

400

The radius is 52 in

What is 326.72 in

400

The circumference is 12.56 cm.

The area is 12.56 cm2

500

A portion of the outside of the circle.

What is arc.

500

The area is 706.858in2

What is 15in

500

The area is 201.06m2

What is 16m

500

The area is 28.27 m2

What is 18.849m

500

The circumference is 56m.

What is 249.40 m2