👉 Perimeter is a measurement of the length around a geometric shape. It can be defined as the distance around the outside edge of a polygon, rectangle, circle, or any other 2D shape. For example: - The perimeter of a square (a 4-sided shape) would be calculated by adding up all its sides. - The perimeter of a rectangle (a quadrilateral with two pairs of opposite sides equal in length) would be the sum of its lengths along its two opposite sides.
