What is the sum of the measures of the internal angles of a triangle is

Find the interior angle of a regular polygon which has 6 sides

What are two numbers that have a sum of 15?

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?