Answer:
d. 11
> Step-by-step explanation:
Let the points be A,B,C
#A
(leg3)
(leg1)
(leg2)
#B
We have to find perimeter



#C
The length of leg3=17.4units
Usually I just use slope calculator hope that helps
There is a possibility that k could be negative 18 as -18 times 2/3 equals -12