THE DEVELOPMENT OF NAPOLEON’S THEOREM ON QUADRILATERAL WITH CONGRUENCE AND TRIGONOMETRY

This thesis discusses about Napoleon’s theorem on a quadrilateral that has is two pairs of parallel side with two cases: (i) square built toward outside and (ii) square built toward inside. The Napoleon’s theorem is proved by using congruence approach and trigonometric concepts. At the end of the discussion, the Napoleon’s theorem is developed by using the concept of intersecting parallel lines and using Geogebra applications