The lowest point on earth surface is the shore of the dead se, elevation -1,344.99 meters. the highest point, the summit of mount everest is 30,380.42 meter above the dead sea. what is the elevation at the summit of mount everest.

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.