On a 10 question exam each question is worth 10 points (no partial credit). How ways can you make a 70%?

Volume of a cylinder with a radius of 13 in and height of 30 in

Ineed me i stuck and i don’t want to get it wrong

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.