Take any quadrilateral such as ABCD above. Construct the midpoints of each side and join them to form another quadrilateral EFGH. Varignon's Theorem asserts that the ...
I HAVE read with much interest the new proof given by Mr. W. E. Johnson of “ the parallelogram of forces,” in NATURE of December 19 (p. 153), and regard it as deserving a place among the best proofs ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback