What is the radius of a circle whose area is 616 square units?
A = pi * r^2
616 = 3.14 * r^2
616/3.14 = r^2
196.178 = r^2
14 = r
I cannot recognise the math
To find the radius of a circle given its area, you can use the formula A = πr², where A represents the area of the circle and r represents the radius.
In this case, we are given that the area of the circle is 616 square units. So, the equation becomes 616 = πr².
To find the radius, we can rearrange the equation to solve for r. Divide both sides of the equation by π:
616/π = r².
To isolate r², we divide both sides by π:
r² = 616/π.
Now, to find r, we can take the square root of both sides of the equation:
√(r²) = √(616/π).
Since we are dealing with a physical measurement, the radius cannot be negative. Therefore, we only need to consider the positive square root:
r = √(616/π).
Using a calculator, you can divide 616 by π and then find the square root of the result to get your final answer for the radius.