Question

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 formed by two segments that are sides of the triangle. d. it is complementary to one of the interior angles of the triangle.

Explanation:

An exterior - angle of a triangle is formed by extending one of the sides of the triangle. It forms a linear pair (sum of the angles is 180°) with one of the interior angles of the triangle. Option A is incorrect as it is formed by a side and an extension of another side. Option C is incorrect because it is not formed by two non - extended sides. Option D is incorrect as it is supplementary (not complementary) to one of the interior angles.

Answer:

B. It forms a linear pair with one of the interior angles of the triangle.