Respuesta :
B)Use the slope formula to prove that there are two pairs of parallel sides.
Answer and step-by-step explanation:
If a quadrilateral is a parallelogram, then opposite sides are parallel.
To test this, Roger would need to find the slope of the opposite sides of the parallelogram; if the slopes are the same, then the sides are parallel.
He would need to do this for both pairs of opposite sides.
