Posts Tagged ‘area’
Why does a triangle have an area?
Posted by: Gary Ernest Davis on: February 23, 2011
In a lovely series of videos James Tanton clarifies the formula for the area of a plane triangle. Starting from some simple postulates, namely: area is additive over finitely many parts that do not overlap; congruent figures have equal area; a rectangle of length and width has area James shows that, if a triangle has […]
A little bit of pi(e)
Posted by: Gary Ernest Davis on: January 15, 2010
My wife likes to eat at Not Your Average Joe’s on Route 6 in Dartmouth, Massachusetss. I’m a vegetarian so my choices are more lmited. NYAJ has passable choices for a vegetarian, inlcuding pizzas. Usually a 10″ garden pizza does me. When I first started ordering pizzas from Joe’s I was still teaching pre-service elementary […]
