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15
×
If the circumference of a circle is 31.4 cm what is its radius?
Answer: 5 cm
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15
×
How does the area of a semi-circle differ from the area of a full circle with the same radius?
Answer: The area of a semi-circle is half that of a full circle.
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eraser
Reset score!
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seesaw
Swap points!
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gift
Win 25 points!
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banana
Go to last place!
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15
×
If the radius of a circle is 5 cm what is its circumference?
Answer: 31.4 cm
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15
×
Determine the area of a quarter-circle with a radius of 5 meters.
Answer: 9.82 mÂē
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lifesaver
Give 5 points!
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rocket
Go to first place!
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gift
Win 25 points!
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baam
Lose 20 points!
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15
×
A circular pond has an area of 78.5 square meters. Find the radius of the pond.
Answer: 5 meters
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15
×
Explain the relationship between the radius and the diameter of a semi-circle.
Answer: The radius is half the length of the diameter in a semi-circle.
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baam
Lose 20 points!
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shark
Other team loses 5 points!
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rocket
Go to first place!
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thief
Give points!
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15
×
Calculate the area of a circle with a radius of 3.5 cm.
Answer: 38.48 cmÂē
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15
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A semi-circular garden has a circumference of 22 meters. Calculate its radius.
Answer: 3.50 meters
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15
×
If the area of a quarter-circle is 19.63 square centimeters find its radius.
Answer: 2.80 cm
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15
×
Determine the circumference of a circle with a diameter of 14 meters.
Answer: 43.96 meters
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15
×
Explain what a quarter-circle is.
Answer: One-fourth of a circle
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heart
Other team wins 25 points!
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gold
Win 50 points!
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gift
Win 20 points!
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banana
Go to last place!
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15
×
If the area of a circle is 154 square centimeters find its radius.
Answer: 7 cm
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