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babunello [35]
3 years ago
15

Suppose the area of a circle is 4π. What is its diameter?

Mathematics
2 answers:
mart [117]3 years ago
6 0
Area=pi times radius^2 so

if area=4pi=pi times r^2
4 times pi=r^2 times pi
divide both sdies by pi
4=r^2
square root
2=radius since legnth cannot be negative

radius=1/2 diamters
2 radius=diameter
2(2)=diameter=4
diameter=4
Ganezh [65]3 years ago
6 0
A=4\pi=\pi r^2\\
4\pi=\pi r^2\\
r^2=4\\
r=2\\\\
d=2r\\
d=2\cdot2\\
d=4
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