Finding Circumference
Circles
More Circles
Area
Circumference & Area
100

What does circumference mean?

Circumference is the distance around the outside of a circle.

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What is the radius of a circle with a diameter of 22 cm?
11 cm
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What is the radius of a circle with a diameter of 12 cm?
6 cm
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What does area mean? 

Amount of space that a shape (circle) is taking up.
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What is the area of a circle with radius 10m?

314 m2

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What is the circumference of a circle with a diameter of 2cm?

6.28

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What is the radius of a circle with the diameter of 126 cm?

63 cm

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Which is longer the radius or diameter?
Diameter
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What is the area of a circle with a radius of 35cm?

3846.5 cm2

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What is the circumference of a circle with radius 15 cm?

94.2 cm

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What is the circumference of a circle with a diameter of 6 cm?
18.84
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What is the diameter of a circle with the radius of 14 cm?
28 cm
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The diameter of a circle is 46 cm what is the radius of that circle?
23 cm
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What is the equation for area of a circle?

Area= 3.14 x r2

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What is area of a circle with diameter of 20 ft? 

314 ft2
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What is the circumference of a circle with the radius of 4cm?

25.12

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What is the diameter of a circle with a radius of 100 cm?
200 cm
400
What does pi equal?
3.14
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What is the area of a circle that has a diameter of 22ft??

379.94 ft2

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*** DOUBLE JEOPARDY ***

Circumference of a circle is 18 cm. What is the radius? (write your answer with 2 digits behind decimal--no rounding)

2.86 cm

500

What is the circumference of a cirlce with a radius of 6 cm?

37.68

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What is the radius of a circle with a diameter of 100cm?
50 cm
500
How do you find the circumference of a circle?
Multiply 3.14 x the Diameter 3.14 x D
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What is the area of a circle with a diameter of 5 cm?

19.625 cm2

500

Circumference of a circle is 21.98. What is the radius?

3.5 cm

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