What is the simplest radical form of 20

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.

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

In the triangles, bc =de and ac fe.if the mzc is greater than the mze, then ab isdfelth