1. For a triangle XYZ, we use [XYZ] to denote its area.

Let ABCD be a square with side length 1. Points E and F lie on line BC and line CD, respectively, in such a way that angle EAF=45 degrees If [CEF]=1/9, what is the value of [AEF]?

Nope! I just needed help on the same question. NerdyKid posted the question almost two years ago, and I just discovered the site over summer of 2020, so yeah..