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math.pentagon-area Calculator
Calculates the area, perimeter, apothem, and diagonal of a regular pentagon from side length. The regular pentagon has five-fold symmetry and its diagonals naturally form the golden ratio — a unique geometric property.
Inputs
S
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
H
Vertical measurement. For health calculators, typically standing height without shoes.
N
Reference formula or conversion factor shown for context.
Results
area
The computed two-dimensional surface area.
perimeter
The total boundary length of the shape.
apothem
Reference formula or conversion factor shown for context.