What is the diameter of a cone with height 8 m and volume 150 pi m3? A. 7.5 m
B. 5V3 m
C. 7.5V3 m
D. 15 m

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.