Na? triangle, the measure of the first angle is twicetwice the measure of the second angle. the measure of the third angle is 12 degrees12° moremore than the measure of the second angle. what is the measure of each? angle?

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.