Circumference Basics
The distance around a circle.
What is circumference?
This is half the diameter.
What is the radius?
The amount of space inside a circle.
What is area?
What is 3.14?
The lens of a telescope has a radius of 4 centimeters. What is the lens's circumference?
Use 3.14 for (pi).
What is 25.12?
The formula for circumference using diameter.
What is C = 𝜋*d?
If the radius of a circle is 5 units this is the diameter.
What is 10 units?
The formula to calculate the area of a circle.
What is A = 𝜋 * r * r?
The Greek letter representing the ratio of the circumference to diameter.
What is 𝜋?
A teepee has a circular floor with a radius of 3 yards. What is the floor's diameter?
What is 6 yards?
The formula for circumference using radius.
What is C = 2*𝜋*r?
For a circle with a diameter or 8 units, find the radius.
What is 4 units?
If the radius of a circle is 3 units, find the area.
What is 28.26 square units?
The fraction often used to represent pi.
What is 22/7?
Diana works at a lab with a huge circular particle accelerator. It has a radius of 4 kilometers. What is the accelerator's circumference?
Use 3.14 for 𝜋.
If the diameter of a circle is 10 units, the circumference is approximately this value.
What is 31.4 units?
A circle has a radius of 6.5 units. What is its diameter?
What is 13 units?
The diameter of a circle is 15 units? Find the area.
What is 176.625 units?
The radius of a semicircle is 4 miles. Find the area.
What is 25.12 square miles?
When it gets hot, children play in Millersburg's circular water fountain, which has a radius of 18 meters. What is the fountain's circumference?
Use 3.14 for 𝜋.
What is 113.04 meters?
The circumference of a circle is 62.8 units. Find the diameter.
What is 20 units?
If the diameter is three times the radius, the ratio of diameter to radius is this.
What is 3:1?
The diameter of a circle is 38 units. Find the area.
What is 536.94 square units?
The radius of a quarter circle is 3 kilometers. Find its area.
What is 7.07 square kilometers?
During a senate campaign, a volunteer passed out a "Vote for McClure" button. The campaign button has a radius of 4 centimeters. What is the button's area?
Use 3.14 for 𝜋.
What is 50.24 square centimeters?