If you have the radius, then area = pi*r2 which you then round to the nearest hundredth.
If you do not know the radius but do know the diameter or circumference, you can calculate the radius. Otherwise you need to measure it.
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all you do is find the area of the circle... if you mean find the squares area, find the area of the circle, and then the square's area and subtract the squares area to the circles area
You find the area of the whole square first. Then you find the area of the circle inside of it And then subtract the area of the circle from the area of the square and then you get the shaded area of the square
The area of a circle can be found with the formula (pi)r^2
The area of a circle is π (Pi) times the Radius squared.
To find the circumference of a circle then multiply pi (3.14159265...) by the diameter of the circle. To find the area then multiply pi by the radius squared.