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Archives  ·  Vol. 9, No. 1 (2021)

On an Inequality Between Side Lengths of Triangles

Ruti Segal — Oranim – Academic College of Education, Tivon, Israel, and Shaanan, Academic College of Education, Haifa, Israel.
Moshe Stupel — Shaanan Academic Education College

Abstract

The authors, using a proof without words style, explore a lesser known variation of the triangle inequality involving the difference between the sum of the lengths of any two sides and the length of the third side. The authors provide a web applet for further exploration.

Keywords: geogebra, triangle relationships, conjecturing


Licensed under CC BY-NC-SA 4.0 · ISSN 2162-3856  ·  North American GeoGebra Journal