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Help with this one can’t figure it out

Help with this one can’t figure it out-example-1

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To solve the problem shown in the figure attached, you must apply the proccedure shown below:

1. You have that the equation for calculate the area of a circle is:

A=πr²

2. You have that the formula for calculate the diameter of a circle is:

d=2r

Therefore, the radius is r=d/2

where r is the radius of the circle

3. Keeping the information above on mind, you have the correct sequence of the equations by clearing the diameter d, is shown below:

A=π(d/2)²
A=πd²/4
4A=πd²
d²=4A/π
d√(4A/π)

Therefore, as you can see, the answer is:

A=π(d/2)²
A=πd²/4
4A=πd²
d²=4A/π
d√(4A/π)
User Choucavalier
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