Q:

# How do you find the shaded area of a circle?

A:

To find the shaded area of a circle, calculate the area of the full circle and multiply it by the fraction of the circle that is shaded. The fraction of the circle that is shaded can be determined by dividing the angle that the shaded region covers by 360 degrees.

## Keep Learning

If 120 degrees of a circle with a radius of 10 centimeters was shaded, the area of the full circle would be 100*pi. Since 120 degrees is exactly one-third of a full circle, multiplying the circle area by 1/3 would yield the shaded area of the circle as 100*pi*1/3, or approximately 104.67 square centimeters.

Sources:

## Related Questions

• A:

One easy method of drawing an elliptical circle includes finding two focus points, attaching a piece of string between them and running a pencil in all directions as far as the string allows. This is not technically considered a true Euclidean construction, but it is a practical and quick way to draw an ellipse with accurate dimensions.

Filed Under:
• A:

An apothem of a triangle depends upon either the length of one of its side or the radius of a circle that fits inside it. There are two methods of determining an apothem through known measurements.

Filed Under:
• A:

One-quarter of a circle is called a quadrant. According to Reference.com, it is also a 90 degree arc. "Quad" is a prefix that means "fourth."