The formula for finding the area of a circle is 𝑨 = π𝒓² The ability to round a number to a number of decimal places or to a number of significant figures is essential if answers are to be ...

The formula to find the area of a circle is to square the radius and multiply by π. The inverse of this is divide the area by π, then square root. 900π ÷ π = 900.

Learn how to calculate the areas of rectangle, triangle, and circle in Excel for a single cell or range of cells usin this formula.

The area of a circle is pi times the radius squared. This is half of a circle with a radius of 1 (no units) such that it would have an area of pi/2.