Show that quadrilateral ABCD is a parallelogram. Select two that apply.
-6
4
-23
B(-2,-2)
21
A(0, 0)
-2
-2
4
y
2
4 6 X
D(4, -2)
C(2,-4)
The product of the slopes of AD and BC is -1
The slope of AB and the slope of CD is 1
AB= CD= 2√//8
1
The slopes of AD and BC are both
2
The product of the slopes of AB and CD is 1
