In the figure above, what is the area of parallelogram ABCD?
In the figure below, ORST is a parallelogram with OR = OT. What is the perimeter of parallelogram ORST?
WXYZ is a parallelogram.
What is the area of a parallelogram whose vertices are (-4,-2), (-2,6), (10,6), and (8,-2)?
In the following figure, if the area of parallelogram ABCD is m-1, and if the length of CE is m- 1/m, then the length of AD is ______.
In the figure below, ORST is a parallelogram with OR = OT. What is the perimeter of parallelogram ORST?