Someone me answer my question need

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.

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

Select all of the following expressions that are equal to 2.5.