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How to Calculate Rectangle Properties
Formula
The area of a rectangle is length times width. The perimeter is 2(l+w).
The diagonal uses the Pythagorean theorem: d = sqrt(l² + w²).
Common use cases:
- Room area for flooring estimates
- Fencing perimeter calculations
- Screen size diagonal measurements
Frequently Asked Questions
Dr. David Park
Applied Mathematician, PhD Mathematics
David holds a PhD in Applied Mathematics from MIT. He has published research on numerical methods and computational algorithms used in engineering and scientific calculators.
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