Mutembei, Josephine, Waweru Kamaku, and Benard Kivunge. “ Two and Three Arcs”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 24, no. 3 (September 25, 2015): 112–121. Accessed July 3, 2024. https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/4486.