Give the answer and HOW U WORKED IT OUT PLEASE. thanks.

9

Step-by-step explanation:

well the perimeter of one shape is 3 because 3 times 1 is 3 then you do the same for the other two shapes then add it and you get 9.

what

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c