References
1. Nelsen, Roger Proofs Without Words: Exercises in Visual Thinking. MAA. 1993. Print.
2. Nelsen, Roger Proofs Without Words II: More Exercises in Visual Thinking. MAA. 2001. Print.
3. Bogomolny , Alex."Proofs Without Words". Cut The Knot, 1998. 2015.
4. Howe, Roger E., "The Cuoco Configuration", The American Mathematical Monthly. 120. (2013): 916- 923. Print.
5. Edwards, Steven., "An Infinite Series Using Golden Triangles", The College Mathematics Journal .45.2 (2014): 120.[/list]