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If the ratio between areas of two circles is 16:25, then find the ratio between their radii.
The ratio between the areas of two circles is 16:25, so the ratio between their radii is √16:√25 = 4:5.
The length of an arc of a circle with central angle θ and radius r is
Which of the following is correct?
A sector and a segment of a circle can have the same area.
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