The Mathematical Intelligencer (edited by Chandler Davis and Marjorie Senechal) has a long tradition of including various sorts of poems with mathematical connections -- and in April 2009 they included the following visual poem, "Right Triangle," by Li C. Tien, a retired chemical engineer who earned his PhD from the University of Michigan.
Right Triangle by Li C. Tien
(click on image to enlarge)
I very much like the way that the mathematician-poet has shaped the story of the Pythagorean Theorem into squares on the sides of the right triangle -- but have been disappointed not to discover a Pythagorean relationship among the numbers of letters, syllables, or words of the three squares.
In addition to writing poetry, Li C. Tien has collaborated on translation of Chinese poets into English, for example, Drizzle and Plum Blossoms.