Srinivasa Ramanujan

“ Squaring the circle
(Journal of the Indian Mathematical Society, v, 1913, 138)
Let be a circle with centre , of which a diameter is . Bisect at and let be the point of trisection of nearer . Draw perpendicular to and place the chord .
Join , and draw and parallel to . Place a chord , and draw the tangent . Join , and . Cut off . Draw parallel to , meeting at . ”