Search

Search Results

• Proof without words: beyond the parallelogram law

  153-156

  C. Alsina

  A. Monreal

  Views:

  21

  We present a visual proof of the parallelogram law and using it we can describe a visual proof of a classical theorem on convex quadrilaterals relating sides and diagonals.

• Proof without words: (a + b)^3 = a^3 +3a^2b +3ab^2 + b^3

  157

  C. Alsina

  A. Monreal

  Views:

  7

  (a+b)^2…