Question

Use parallelogram JKLM to find the measure of Angle KLM.

Answer 1

Since the shape is a parallelogram, you know that angles JKL = JML and angles MJK=MLK.
Knowing that JKL = 109, JML = 109. The internal angles of the parallelogram add up to 360º. If you set MJK = MLK = x, you can setup the equation by adding all of the angles. 109 + 109 + x + x = 360. 218 + 2x = 360.
2x=142
x=71º = KLM.