MathDB
A square. [2011.II.2]

Source:

March 31, 2011
geometryAMC

Problem Statement

On square ABCDABCD, point EE lies on side AD\overline{AD} and point FF lies on side BC\overline{BC}, so that BE=EF=FD=30BE=EF=FD=30. Find the area of square ABCDABCD.