Perimeter & Area
Perimeter measures boundary length while area measures two-dimensional coverage, and area formulas arise from composing or rearranging simpler regions.
What you'll learn
- Distinguish boundary length from interior coverage.
- Derive rectangle area from rows of unit squares.
- Use linear units for perimeter and square units for area.
- Recognize that equal perimeter need not imply equal area and equal area need not imply equal perimeter.
- Use a perpendicular height in triangle area even when it is not a visible side.
Before you start
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