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Circumference and Area of Circle
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Pi is equal to the ratio of the ____________ of a circle divided by its ____________.
CIRCUMFERENCE divided by its DIAMETER
What is the circumference of the circle?
56.52 inches
What do you call this symbol?
The symbol is the Greek letter, pi.
What is the diameter of a circle with a radius of 3.25 feet?
6.5 feet
The diameter of the window is 5 feet. What is its circumference?
15.7 feet
The commemorative 1988 plate celebrating Mickey Mouse's 60th birthday is 9 inches in diameter. What is the CIRCUMFERENCE of the plate?
28.26 inches
The commemorative 1988 plate celebrating Mickey Mouse's 60th birthday is 9 inches in diameter. What is the area of the plate?
63.585 square inches (63.585 in^2)
The Jeep spare tire cover has a radius of 16 inches. What is the circumference of the cover?
100.48 inches or approximately 8 feet
The diameter of the window is 5 feet. What is its area?
19.625 square feet (19.625 ft^2)
What is the area of this circle?
3215.36 square centimeters or 3215.36 cm^2
What is the diameter of this circle?
64 centimeters
What's the area of a circle with a radius of 5 miles?
78.5 square miles (78.5 mi^2)
Find the circumference of a circle with a diameter of 12 inches.
37.68 inches
What is the approximate value often used for pi?
3.14
The radius of a circle is 130 meters. What is the unit of measurement used for the circumference of this circle?
meters
The diameter of a circle is 7.5 miles. What is the unit of measurement when you find the area of the circle?
square miles or miles^2. (^2 means "to the power of 2.")
Where is the circumference of a circle?
The circumference of a circle is the distance around the circle.
What is the diameter of a circle?
It's a line that goes from one edge of a circle through the center of a circle touching the opposite edge.
What is the radius of a circle when the diameter is 18 inches?
9 inches
What is the formula for finding the area of a circle?
Pi (3.14) times radius times radius
What's the formula for finding the circumference of a circle?
Multiply 3.14 times the diameter of the circle
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