Terms
Find the Diameter
Find the Radius
Finding Circumference
Finding Area
100

What is the numerical value for pi?

3.14

100

The radius of a circle is 5mm. What is its diameter?

10mm

100

The diameter of a circle is 18 ft. What is its radius?

9 ft

100

The diameter of a circle is 8 yards. What is the circumference of the circle?

25.12 yards

100

What is the formula for area of a circle?

A = pi x r2

200

What is the distance (line) that starts at the center of a circle and goes out to its circumference. 

Radius

200

The radius of a circle is 12 cm. What is its diameter?

24 cm

200

The diameter of a circle is 160 cm. What is its radius?

80 cm
200

The diameter of a circle is 10 mm. What is the circumference of the circle?

31.4 mm

200

The radius of a circle is 5 cm. What is the area of the circle?

78.5 cm2

300

What part of the circle is the distance from one point on a circle, through the center, to another point on the circle.

Diameter

300

The radius of a circle is 350 ft. What is its diameter?

700 ft

300

Th diameter of a circle is 27 yards. What is its radius?

13.5 yards

300

The radius of a circle is 4 units. What is the circumference of the circle?

25.12 units

300

The radius of a circle is 3 in. What is the area of the circle?

28.26 in2

400

What is the name for the outer edge of a circle?

Circumference

400

The circumference of a circle is 37.68 in. What is the diameter of the circle?

12 in 

400

The circumference of a circle is 18.84 cm. What is its radius?

3 cm

400

The radius of a circle is 22 ins. What is the circumference of a circle?

138.16 ins

400

The diameter of a circle is 12 ft. What is the area of the circle?

113.04 ft2

500

What is the relationship between pi and diameter and circumference?

Pi is the ratio of the circumference to the diameter.

Pi is circumference divided by diameter. 

500

The circumference of a circle is 43.96 cm. What is its diameter?

14 cm

500

The circumference of a circle is 47.1 in. What is its radius?

7.5 in

500

What are the formulas for the circumference of a circle?

C =  pi x d

C = 2 pi r

500

The diameter of a circle is 24 yards. What is the area of the circle?

452.16 yards2