Math
Parallelogram Perimeter Calculator
Find the perimeter of a parallelogram from its two side lengths.
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A parallelogram has two pairs of equal sides, so its perimeter is twice the sum of the two side lengths.
The math behind it
perimeter = 2(a + b), since opposite sides are equal.
Worked Example
Sides 8 and 5 → perimeter 26.Frequently Asked Questions
Do the angles affect the perimeter?
No — only the side lengths matter for perimeter.
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