Polygons are two‐dimensional shapes that are formed by three or more straight sides. You will be analyzing these geometric figures to find the total degree value of a polygon, the perimeter of a polygon, and the area of a polygon.

- The
**perimeter**is the measurement of the sum of the side lengths of a polygon. - The
**area**is the measurement of the inner portion of the polygon.

- A rhombus has an area of 128. If the length of one diagonal is 16, what is the length of the other diagonal?
- A 9 sided regular polygon has a side length of 7. If the polygon has an area of 441, what is the length of the apothem?
- What is the measure of an exterior angle of a regular hexagon?
- How many diagonals does a regular polygon with 12 sides have?
- What is the measure of an interior angle of a regular heptagon?

**Answers to Practice Problems**

- 16
- 14
- 60
- 54
- 128.57

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