Classify each triangle with the set of side lengths given as acute, right, or obtuse. 3, 5, and 7

4.5, 6, and 7.5

6, 8, and 9

1.2, 2.5, and 3.1

8, 15, and 17

14, 19, and 21

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?