Oxman, V. (2022) “Proof Without Words: One Elegant Relationship Between the Angles Formed in an Acute Triangle”, Ohio Journal of School Mathematics, 91(1), p. 1. Available at: https://www.osu.tests.sfulib4.publicknowledgeproject.org/index.php/OJSM/article/view/8844 (Accessed: 29 April 2026).