How To Find Perimeter in 5 Mins

The perimeter is the total length around a shape. To find it, you simply add up the lengths of all the outer sides.

Whether you’re working with basic shapes like squares, rectangles, and triangles, or more complex shapes like compound figures, the rule is the same:

Perimeter = Sum of all outer sides

For regular shapes, use simple formulas:

Square: 4 × side

Rectangle: 2 × (length + width)

Triangle: Add all three sides

For irregular or compound shapes, identify all outer sides, calculate any missing lengths, and then add them up.

This quick method helps students solve perimeter problems in classwork, exams, or real-life situations like measuring a fence or outlining a floor.

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