GeoGebra

Haga’s Origamic activities require students to explore simple, geometric properties found when we fold paper in prescribed ways. The aim of these activities is to give students easy-to-explore paperfolding puzzles so that they can experience a micro-version of the three stages of mathematical research: exploration, conjecture and proof.
Here we look at one such activity from the chapter “X-Lines with lots of Surprises”.

Thomas Lingefjärd shares some mathematically interesting connections and oddities of the number 7.

Explore geometrical ideas and concepts with "geogebra" - a dynamic geometry software (DGS) that allows the user to construct an object and explore its properties by dragging its component parts -  in this article by Sneha Titus and Jonaki Ghosh. 

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