Polygon in Polygon

Topic:Area

James Tanton, inspired by Vincent Pantaloni, tweeted an image I misunderstood, then found something cool. Leaves me wondering why the area case is different for n=4. Tanton tweet

New Resources

Trophy (version 2)
apec
Constructing an Isosceles Triangle with Given Side + Activities
Tube at distance of a 3D curve.
bewijs stelling van Pythagoras

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Area and Perimeter
Ch. 8 Project
straight line graphs
average and spread
Triangle Area

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Ratios
Sphere
Differential Calculus
Line Segment
Arithmetic Mean