# The Product of the Inradius and Semiperimeter of a Triangle

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Let ABC be a triangle, * *its inradius, and * *its semiperimeter. Then .

Contributed by: Jay Warendorff (March 2011)

After work by: Alexander Bogomolny

Open content licensed under CC BY-NC-SA

## Snapshots

## Details

A. Bogomolny, "Relations between Various Elements of a Triangle," *Interactive Mathematics Miscellany and Puzzles*.

## Permanent Citation

"The Product of the Inradius and Semiperimeter of a Triangle"

http://demonstrations.wolfram.com/TheProductOfTheInradiusAndSemiperimeterOfATriangle/

Wolfram Demonstrations Project

Published: March 7 2011