Is AB perpendicular to CD? Explain. 5
4
Yes, because the slope of ĀB is and the slope of
3
2.
A(0,2)
Zo is -
C(-4,1)
Yes, because the slope of ĀB is and the slope of
-5 4 -3 2-1
4
5
X
1 2 3
D(0,-2)
Zo is -
B(-3,-3)
No, because the slope of AB is 들 and the slope of
nim
is -
No, because the slope of ĀB is and the slope of
CD is -
no