Terms
What is the numerical value for pi?
3.14
The radius of a circle is 5mm. What is its diameter?
10mm
The diameter of a circle is 18 ft. What is its radius?
9 ft
The diameter of a circle is 8 yards. What is the circumference of the circle?
25.12 yards
What is the formula for area of a circle?
A = pi x r2
What is the distance (line) that starts at the center of a circle and goes out to its circumference.
Radius
The radius of a circle is 12 cm. What is its diameter?
24 cm
The diameter of a circle is 160 cm. What is its radius?
The diameter of a circle is 10 mm. What is the circumference of the circle?
31.4 mm
The radius of a circle is 5 cm. What is the area of the circle?
78.5 cm2
What part of the circle is the distance from one point on a circle, through the center, to another point on the circle.
Diameter
The radius of a circle is 350 ft. What is its diameter?
700 ft
Th diameter of a circle is 27 yards. What is its radius?
13.5 yards
The radius of a circle is 4 units. What is the circumference of the circle?
25.12 units
The radius of a circle is 3 in. What is the area of the circle?
28.26 in2
What is the name for the outer edge of a circle?
Circumference
The circumference of a circle is 37.68 in. What is the diameter of the circle?
12 in
The circumference of a circle is 18.84 cm. What is its radius?
3 cm
The radius of a circle is 22 ins. What is the circumference of a circle?
138.16 ins
The diameter of a circle is 12 ft. What is the area of the circle?
113.04 ft2
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.
The circumference of a circle is 43.96 cm. What is its diameter?
14 cm
The circumference of a circle is 47.1 in. What is its radius?
7.5 in
What are the formulas for the circumference of a circle?
C = pi x d
C = 2 pi r
The diameter of a circle is 24 yards. What is the area of the circle?
452.16 yards2