### All High School Math Resources

## Example Questions

### Example Question #23 : Geometry

If the area of a regular octagon is 160 and the apothem is 8, what is the side length?

**Possible Answers:**

**Correct answer:**

Explanation:

To find the side length from the area of an octagon and the apothem we must use the area of a polygon which is

First plug in our numbers for area and the apothem to get

Then multiply to get

Then divide both sides by 4 to get the perimeter of the figure.

When we have the perimeter of a regular polygon, to find the side length we must divide by the number of sides of the polygon, in this case 8.

After dividing we find the side length is

John

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### All High School Math Resources

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