The perimeter of a rectangle is the distance around the outside. Formula: 2 × width + 2 × height, or 2(w + h).
A rectangle with width 5 and height 3 has perimeter 2(5 + 3) = 16.
In coordinate problems, perimeter = 2(|x₂ - x₁| + |y₂ - y₁|).
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$ curl repovive.com/roadmaps/math-fundamentals/geometry-basics/rectangle-perimeter
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