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The area of an object cannot be compared to its perimeter - perimeter is measured in units of length, but area is measured in units squared.

Objects with the same perimeter can have different areas.

Area does not equal length plus width.

**Study and practice**

- Quiz yourself on finding the area of a rectangleThis page from mathopenref.com explains how to find the area of a rectangle and then allows you to design rectangles and find their area. (NOTE: If the virtual manipulative does not work for you, try clicking the "full screen" button.)
- Quiz yourself on finding the area of a triangleThis page from mathopenref.com shows you how to find the altitude (height) of a triangle and how to calculate the area. You can test knowledge by designing triangles and finding their area. (NOTE: If you have trouble with the manipulative, try clicking the "full screen" button.)

Use these search terms to find additional resources:

*area of squarearea of rectanglearea of triangle*