Calculate perimeter of 2D shapes with step-by-step explanations and formulas.
P = 2(l + w)
Where l is length, w is width
P = 4s
Where s is side length
P = 2πr
Where r is radius
P = a + b + c
Where a, b, c are side lengths
P = n × s
Where n is number of sides, s is side length
P = 2(a + b)
Where a, b are adjacent sides
Length: 10, Width: 5
Side: 6 units
Radius: 4 units
Sides: 5, 6, 7
Perimeter is the total distance around the boundary of a two-dimensional shape. It is measured in linear units (meters, centimeters, inches, etc.).