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777dan777 [17]
3 years ago
12

Find the exact area of a circle having the given circumference.

Mathematics
2 answers:
UkoKoshka [18]3 years ago
8 0

Answer:

The answer is the option C

12\pi\ units^{2}

Step-by-step explanation:

we know that

the circumference of a circle is equal to

C=2\pi r

In this problem we have

C=4\pi\sqrt{3} \ units

substitute in the equation and solve for r

4\pi\sqrt{3}=2\pi r

2\sqrt{3}= r -------> r=2\sqrt{3}\ units

Find the area of the circle

Remember that

The area of a circle is equal to

A=\pi r^{2}

substitute the value of r

A=\pi (2\sqrt{3})^{2}

A=12\pi\ units^{2}


BaLLatris [955]3 years ago
5 0
Circumference is given by
C=2\pi r
Area is given by
A=\pi r^2

figure out the radius of the circle, then use it to find area
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The factor of the given equation  8x^{2} -4x-84 will be  4(x+3)(2x-7)

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