Spirolaterals were invented and named by Frank C. Odds as a teenager in 1962, as square spirolaterals with 90° angles, drawn on graph paper. In 1970, Odds discovered triangular and hexagonal spirolateral, with 60° and 120° angles, can be drawn on isometric (triangular) graph paper. Frank Odds, British biochemist, 8/29/1945-7/7/2020 Odds wrote to Martin Gardner who encouraged him to publish the results in Mathematics TeacherOdds, Frank C. Spirolaterals, Mathematics Teacher, Feb 1973, Volume 66: Issue 2, pp. 121–124 DOI in 1973.Focus on...Spirolaterals Secondary Magazine Issue 78
