Math CentralQuandaries & Queries


Question from Sambo:

what do parallelogram, rhombus and rectangle have in common?

Hi Sambo,

They are all the names of two-dimensional figures but I don't expect that is the answer expected. Think about some other two-dimensional shapes, say a triangle, octagon and a circle. what properties do a parallelogram, a rhombus and a rectangle have that a triangle, an octagon and a circle don't.


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