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A circle had a diameter of 10. what is its area?
That means a radius of 5. Using the standard circular area formula (Pi * r ^ 2), the resulting area is exactly 25 * Pi. Using a numerical estimate for Pi, the area is about 78.5398.
How do you find the area of a circle in square inches?
By using the formula: area of circle = pi*radius2
What is the formula for finding the surface area using 3.14?
Assuming that 3.14 is pi, then most likely you're looking for the surface area of a circle, which is pi x r2.
What is the formula for area and circumference of a circle?
The formula for the area of a circle is pi * radius squared. The circumference of a circle's formula is pi * diameter. NOTE: pi equals approx. 3.14
How do you calculate the area from the circumference?
The area of a circle (A) is pi x r x r.The circumference of a circle (C) is pi x d, or pi x 2r.So if you know C, you can calculate r using the formula C = pi x 2r or r = C/2piOnce you know r, you can calculate A using the formula A = pi x r x r
