Darien is building a support, h, for his roof. In order to properly support his roof, h needs to be the altitude of his triangular roof XYZ. What is the length of the
beam needed to create the support? Round to the nearest hundredth.
5.5 m
h
3.1 m
N
Х
W
-6.3 m

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.