**Author details**

William Deng Tap Department of Mathematics, College (School) of Education, University of Juba, South Sudan

\*Address all correspondence to: tapx0001@umn.edu

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

*Teaching and Learning Mathematics for Understanding, Enjoyment and Everyday Life… DOI: http://dx.doi.org/10.5772/intechopen.99101*
