1. The ladder AB leans against the strong surface to form a right triangle ABC, with AC perpendicular to BC and AC = BC. When the top of ladder A slides down X meters in AC direction, the bottom of ladder slides down Y meters in CB direction. Can you compare the size of x and y?

2. In a triangular BCA, angle C=90 degrees, angle B=45 degrees, D is the focus of AB, and E.F is on AC. BC is 0, DE is perpendicular to DF, AE= 12 and BF=5 are known, and the area of triangle DFE is found.

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