Quadrilaterals in an Isosceles Triangle: 10653

Marcin Mazur, Roy Barbara, Jean Anglesio, Robin J. Chapman, N. Lakshmanan, John Melville, G. Peng, C. R. Pranesachar. Quadrilaterals in an Isosceles Triangle: 10653. The American Mathematical Monthly, 107(1):89-91, 2000. [doi]

Abstract

Abstract is missing.