Find the perimeter of triangle abc with the verticies a(-5,5) b(3,-5) and c(-5,1

Hello!
 
Let's calculate a distance between two points using the Pythagorean theorem:

Data:

Solving: distance from A to B

Solving:
 
distance from A to C

Data:

Solving:

distance from B to C

Data:

Now let's calculate the perimeter of the triangle ABC, knowing that the perimeter is the sum of the sides, then: