MathDB
2021 Geo Div 1 P2 (Div 2 P6)

Source:

March 2, 2021
geometry

Problem Statement

In convex quadrilateral ABCDABCD, ADC=90+BAC\angle ADC = 90^\circ + \angle BAC. Given that AB=BC=17AB = BC = 17, and CD=16CD = 16, what is the maximum possible area of the quadrilateral?
Proposed by Thomas Lam