Aplane is flying at a constant height of 8000m. it flies vertically above me and 30 seconds later the angle of elevation is 74°. find the speed of the plane in metres/second.

In the picture below, line pq is parallel to line rs, and the lines are cut by a transversal, line tu. the transversal is not perpendicular to the parallel lines. note: figure is not drawn to scale. which of the following are congruent angles?