Pentagon Calculator

Created by Luis Fernando
Last updated: Jun 24, 2022
Regular pentagons have internal angles of 108°. This calc relates the side length to the corner-center distance, edge-center distance, and area.
Luis Fernando
image of pentagon with side, diagonal, height, circumcircle radius and apothem marked.
Side (a)
in
Perimeter
in
Area
in²
Diagonal (d)
in
Height (h)
in
Circumcircle radius (R)
in
Incircle radius (apothem) (r)
in
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