The volume of a medal is 35 cm3 The medal is made from copper and tin.
volume of copper : volume of tin = 21:4
The density of copper is 8.84 g/cm3
The density of tin is 7.38 g/cm3
Work out the mass of the medal.

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.