Ali, Clement Ayarebilla. “An Analysis of Ethnomathematics Didactical Contract in the Sums of Interior and Exterior Angles”. Brillo Journal 3, no. 2 (June 25, 2024): 83–101. Accessed December 21, 2024. https://journal.sncopublishing.com/index.php/brillojournal/article/view/52.