What is the difference between a square and a rectangle? a) a square is a parallelogram and a rectangle is not. b) a square has 4 equal sides and a rectangle does not. c) a square has 4 right angles and a rectangle does not have to. d) a square does not have 2 sets of parallel sides and a rectangle does.

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.