Hey Gummy Bears,
Here is a parallelogram problem for you to work on together. You can post comments, solutions, questions, ideas all in the interest of progressing the solution to the problem. Don't forget to use mathematical vocabulary so that everyone will know exactly what you are referring to. (No saying things like the number beside the thingy with the little side. ;^)

If a parallelogram is a non-rigid figure, find the minimum and maximum values for each of the diagonals if the lengths of the sides are 5 and 12.

For anyone wanting extra study tools, don't forget to try the multiple choice quizzes that I posted earlier this month.