Compatible numbers to find two estimates 59/413

What is the area of the trapezoid shown ?

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

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.