This one stumped me. Thought you might enjoy..
What are the lengths of the diagonals?
It should be related to law of sin/cos. (The answers are decimal)
Hint: If you cut off a parallelogram from the left, you get a triangle with a base of 3 and a top angle of (what?). The law of sines then gives you the other two sides. Then restore the parallelogram, draw the diagonals, and use the law of cosines.