**Round Hole**

**Measure** the distance across the **hole**, and then divide this value by two. This is the **hole’s** radius. (Note: After obtaining **measurements**, remember to convert the units to feet.) Multiply the radius value by itself.

Besides, how do you find the volume of a round hole?

A **hole** is a cylinder, so to find the **volume** of a **hole**, **calculate the volume** of a cylinder. The **volume** of a cylinder is defined as the number of cubic units that will fill that cylinder. This **formula** is pi * radius squared * height = **volume**.

One may also ask, how do you find the circularity of a hole? To achieve this, a common **measure** of **circularity** is given by four times pi times the area divided by the perimeter squared: C = 4_pi_A/P^2 ~ 12.57_A/P^2, where C is the **circularity**, A is the area and P is the perimeter. For a circle, C = 1.

Subsequently, one may also ask, how do you determine the size of a circle?

The circumference = π x the diameter of the **circle** (Pi multiplied by the diameter of the **circle**). Simply divide the circumference by π and you will have the length of the diameter. The diameter is just the radius times two, so divide the diameter by two and you will have the radius of the **circle**!

What is the formula for calculating the area of a circle?

C = pi * d calculates the circumference (distance around the outside of the **circle**). D in the **formula** refers to the diameter which is the width of the **circle**. The **formula** for the **area of a circle** is A = pi * r * r where r is the radius (diameter / 2).