Bau & Geometrie · Glossar
What is Perimeter?
Schnelldefinition
The total distance around the outside of a 2D shape. Measured in linear units (m, ft).
Vollständige Erklärung
Perimeter is the total length of the boundary of a 2D shape. Formulas: Rectangle P = 2(length + width); Triangle P = a + b + c (sum of sides); Circle (called circumference) P = 2πr. Perimeter is used for fencing, trim, baseboards, picture rails, and any task that follows the edge of a shape. To calculate material needed for the boundary (like fence boards), use the perimeter. To calculate material needed to fill the shape (like tile), use the area. The two are often used together in construction: perimeter for edge, area for fill.
Verwandte Rechner
Calculators that use or explain Perimeter.
Verwandte Begriffe
More from Bau & Geometrie
Area
The amount of 2D space inside a shape, measured in square units (m², ft², acres, hectares).
Volume
The amount of 3D space inside a shape, measured in cubic units (m³, ft³) or in liters/gallons.
Circumference
The perimeter of a circle — the total distance around it. C = 2πr, or C = πd.
Slope
The steepness of a line, calculated as rise over run. Slope = (y₂ - y₁) / (x₂ - x₁).
Density
Mass per unit volume, typically in kg/m³ or g/cm³. Different materials have characteristic densities.
Last reviewed: June 15, 2026 • Category: Bau & Geometrie