Motseki, Puleng, and Zingiswa Jojo. “The Effectiveness of Using the Geometer’s Sketchpad to Enhance TVET College Level 4 Students’ Understanding of Circle Geometry”. Progressio 43 (2022): 17 pages. Accessed July 3, 2024. https://unisapressjournals.co.za/index.php/Progressio/article/view/12422.