the use of e-cigarettes among young adults has increased steadily over time according to the graph how much did this trend change between the years of 2013 and 2014

Is the orthocenter of a triangle on the inside ?

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

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.