This math skill teaches how to determine the fraction of a whole circle represented by a sector. It involves calculating the area of an entire circle and comparing it to the area of the sector to find the fraction.
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Fraction from a circle's sector area
Test your understanding of fraction of a circle from sector area by practicing it! Work through the below exercises to use it in practice.
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What is the fraction of the circle if its sector area is 37.7?
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We can find the area of the full circle using pi times r squared
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Which would be 36 pi, or around 113.1
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So our sector covers one 37.7 out of 113.1 of the circle
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Which simplifies to one third of the area of the circle