Jack has 14 cards. by the end of the week his amount of cards has doubled. how many cards does jack have now

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.

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.