In circle B with \text{m} \angle ABC= 42^{\circ}m∠ABC=42 ∘ , find the angle measure of minor arc \stackrel{\Large \frown}{AC}. AC ⌢ .

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.