Help please I don’t understand this at all

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.

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.