**U.S. National Education Standards**. A polygon is any 2-dimensional shape formed with straight lines. The perimeter of a polygon is the sum of all its length. Read More...

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Study GuidePerimeter

Worksheet/Answer keysPerimeter

Worksheet/Answer keysPerimeter

Worksheet/Answer keysPerimeter

Worksheet/Answer keysPerimeter

Worksheet/Answer keysPerimeter

Worksheet/Answer keysPerimeter

N.3. Geometry

3.1. Analyze characteristics and properties of two- and three-dimensional geometric shapes and develop mathematical arguments about geometric relationships.

3.1.1. Identify, compare, and analyze attributes of two- and three-dimensional shapes and develop vocabulary to describe the attributes.

3.4. Use visualization, spatial reasoning, and geometric modeling to solve problems.

3.4.5. Use geometric models to solve problems in other areas of mathematics, such as number and measurement.