# Perimeter

The distance around the edge of a figure or shape. For example it is the sum of the lengths of each side of polygon. For circles and ellipses, it is called the circumference.

## Pages referring to 'perimeter'

Area and perimeter of a rectangle (coordinate geometry)
Area and perimeter of a square (coordinate geometry)
Definition and properties of the circumference of a circle
Formula and description of the perimeter of a kite.
Formula and description of the perimeter of a parallelogram.
Formula and description of the perimeter of a polygon.
Formula and description of the perimeter of a rectangle.
Formula and description of the perimeter of a rhombus.
Formula and description of the perimeter of a square.
Formula and description of the perimeter of a trapezoid.
Formula and description of the perimeter of a triangle.
How to calculate the perimeter (circumference) of an ellipse
Demonstration that a triangle with fixed perimeter does not have a constant area.
How to calculate the area and perimeter of a trapezoid given the coordinates of its vertices
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