The length of a rectangle is nine more than twice the width. If the perimeter is 78 inches, find the dimensions.

Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

In angle pqr find the measure of