Manana, Siyabonga, and Marius Simons. 2026. “The Use of GeoGebra As an Instrument to Facilitate Grade 11 Learners’ Understanding of Cyclic Quadrilateral and Tangent Theorems: A Case Study”. Futurity Education 6 (1):162-80. https://doi.org/10.57125/FED.2026.03.09.