20 points. A triangle has an exterior angle with a measure of 120°. Can you determine the measures of the interior angles? The answer is no, I just need an explanation why, thank you :)

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?

Is the square root of 4 plus the square root of 16 rational?