Answer:
Explanation:
If you know the area A of a circle, you can use the following formulas to find its diameter (d) and circumference (C):
d = √(4A/π)
C = 2πr = πd
where π is the mathematical constant pi (approximately 3.14159), r is the radius of the circle (which is half of the diameter), and d is the diameter of the circle.
To use these formulas, first, calculate the radius of the circle by dividing the area by π and taking the square root:
r = √(A/π)
Then, you can find the diameter by multiplying the radius by 2:
d = 2r = 2 x √(A/π)
And finally, you can find the circumference by multiplying the diameter by π:
C = πd = π x 2 x √(A/π) = 2π√(Aπ)
So, to summarize:
diameter (d) = 2 x √(A/π)
circumference (C) = 2π√(Aπ)