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 very fond memories of high school geometry. Memorizing theorems wasn't too hard, and solving proofs was like solving the logic puzzles that I did for fun anyway. But the theorems were scattered ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American In this episode of My Favorite Theorem, Kevin ...

Ryan Morgan has gotten used to sharing trade secrets with older and wiser mathematicians. So, the Patapsco High School junior was unfazed yesterday when he explained his findings — widely considered a ...