don steward
mathematics teaching 10 ~ 16

Tuesday, 1 December 2015

area for a fixed perimeter

"you have a 32 unit long electro rope for enclosing animals
what areas can be enclosed?
oh, by the way, you will need to know about a world famous right angled triangle"

some suggest that the Ancient Egyptians may have used this triangle to construct right-angles
when building the Pyramids

there seems little evidence for this view

students could explore the areas of rectangles with a perimeter of 32

establish that the perimeters are all 32

what are the areas?
question (8) needs a calculator

"what is the moral of this work?"

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