Answer:
43
Step-by-step explanation:
Perpendicular to the base.
Hope this helps!!!
You just need to plug the values: you have to multiply
and
, and then divide the result by -3.
So, if
, we have 
Which means that 
And the final answer is 
Perimeter is the sum of all the sides of the shape
do you know the length of each side of the parallelogram?