Triangle Inside a Parallelogram
Triangle KNL is constructed so that it shares one of its sides (KL) with one of the sides of parallelogram HKLI. Also, the vertex N of triangle KNL, not on the shared side, can be anywhere on the opposite side (HI) of the parallelogram. What is the probability that a random point inside the parallelogram will also be inside the triangle?

Related External Resources 
Food for Thought from Jay's Diner: Free Pizza!
This problem from Mathematics Teaching in Middle School investigates the chances of hitting a circular ring on a dart board in order to win a free pizza.
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