Given that cm, determine the length of .
In the following figure, , , cm, cm, and cm. Determine the length of .
The opposite sides of the figure are parallel to each other, so figure is a parallelogram.
In a parallelogram, the two diagonals bisect each other. So, we know that the length of is the same as the length of .
To find the length of , we can add the lengths of and .