A Constant Surprise!

Here, a #GeoGebra animation of Vincent Pantaloni's problem posed earlier this week: www.geogebra.org/m/waqpbrac. How can we formally prove the sum of these 2 square areas = 4*R^2, no matter where the large points lie? 🤔 #MTBoS #ITeachMath #geometry #math #maths #FigureThat #EdTech

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