we know that
the perimeter of a polygon is the sum of the length sides
in this problem we have a triangle
so
the polygon has three sides
Let

the perimeter is equal to

The formula to calculate the distance between two points is equal to

Step 1
<u>Find the distance AB</u>

substitutes the values in the formula



Step 2
<u>Find the distance BC</u>

substitutes the values in the formula




Step 3
<u>Find the distance AC</u>

substitutes the values in the formula




Step 4
<u>Find the perimeter</u>
the perimeter is equal to

substitutes the values

therefore
<u>the answer is</u>
