*Many cleaning professionals visit the International Custodial Advisers Network (ICAN) Ask the Experts page for insight and, every **business day, we deliver advice to better help you perform your job.*

I’ve been cleaning office buildings for years, but now I’m looking to start my own cleaning business.

My question is, how do you determine the square footage of areas that are not squared, but oval or circular?

**Monday’s Answer:**

The area of a circle is found by multiplying the radius of the circle by itself and the result by Pi, 3.1416.

A=(Pi)r² Remember, the radius is one-half the diameter.

The area of an oval (ellipse) is calculated by the formula ...

**Lynn E. Krafft, ICAN/ATEX editor**

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