Circle Basics
What is the term for the distance around a circle?
Circumference
What is the radius of a circle if the diameter is 12 cm
6cm
A pizza has a diameter of 14 inches. What is its radius?
7in
The circumference of a circle is 31.4 cm. What is its diameter?
10 cm
If a circle's diameter is doubled, how does the circumference change?
it also doubles
What is the formula for circumference using diameter?
C = πd
Find the circumference of a circle with a diameter of 10 cm.
31.4cm
A bicycle tire has a radius of 30 cm. How far does it travel in one full rotation?
188.4cm
The diameter of a circle is 18 inches. What is its circumference?
56.5 inches
A circular track has a radius of 10 m. How far does a runner travel in one lap?
62.8m
What is the formula for circumference using radius?
(C = 2πr)
If the radius of a circle is 4 cm, what is the circumference?
A clock face has a diameter of 24 cm. What is the circumference of the clock?
75.4cm
A circular plate has a circumference of 25 cm. What is its radius?
3.98 cm
A rope is shaped into a circle with a radius of 7 cm. What is its circumference?
44cm
What is the name of the line segment that passes through the center of a circle and touches both sides?
Diameter
A circular pool has a circumference of 50.24 m. What is its diameter?
16 m
A circular fountain has a circumference of 62.8 feet. What is its radius?
10 ft
The radius of a Ferris wheel is 20 meters. What is the circumference?
125.6 m
A circular racetrack has a radius of 50 m. If a car goes around it 5 times, what distance does it travel?
1570m
What is the name of the line that goes from the centre of the circle and touches one side?
Radius