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ad-work [718]
3 years ago
7

A 20° sector in a circle has an area of 21.5π yd². What is the area of the circle? Use 3.14 for pi.

Mathematics
2 answers:
baherus [9]3 years ago
8 0
This would be 21.5π * 360 / 20 yd^2  =  1215.18 yd^2 ( using pi = 3.14)
ziro4ka [17]3 years ago
7 0

Answer:

The area of the circle is 1,215.18\ yd^{2}

Step-by-step explanation:

we know that

The area of a circle is equal to

A=\pi r^{2}

360\° subtends the complete circle of area \pi r^{2}

so

by proportion

Find the area of the complete circle if a  20\° sector has an area of  21.5\pi\ yd^{2}

\frac{x}{360}=\frac{21.5\pi}{20}\\ \\x=360*21.5\pi /20\\ \\x=387\pi \ yd^{2}

387\pi \ yd^{2}=387*3.14=1,215.18\ yd^{2}

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