Cornerstone bakery sold 78 pies on monday, 96 pies on tuesday, 40 pies on wednesday, 104 pies on thursday, and 77 pies on friday. on average, how many pies did they sell per day

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.