1. A Variant of the Proof of the Pythagorean Theorem by Huygens. Issue 1 (1st January 2019) Authors: Perng, Cherng-Tiao Journal: Mathematics magazine Issue: Volume 92:Issue 1(2019) Page Start: 70 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Euclid's Principle and the Invariance of Areas. Issue 5 (20th October 2018) Authors: Perng, Cherng-Tiao; Coan, Boyd Journal: Mathematics magazine Issue: Volume 91:Issue 5(2018) Page Start: 373 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗