The four points (−2, 5), (−2, −1), (6, −1), and (3, 5) are the vertices of a polygon. What is the area, in square units, of this polygon?
This forms a trapezoid.....the bases are 5 and 8 units and the height is 6
So.....the area = (1/2)height [ sum of the bases ] = (1/2) (6) [5 + 8 ] =
3 [ 13 ] = 39 square units
+307 
