0.5 - (-10.5 • 5) + 40.5 i need the solution to this problem

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.

Pranza plotted point a in the coordinate plane below.

An object in geometry with no width, length or height is a(n):