Question

Show that the following points taken in order form the vertices of a parallelogram.(3, - 5), ( - 5, - 4), (7, 10) and (15, 9)

Answer 1

use the formula:
distance = whole under root(x2-x1)+)y2-y1)
PS: x and y are ordinate and abscissa.
if two opposite sides are equal then its a parallelogram
(PS ALL RECTANGLES R PARALLELOGRAM)