Answer:
Perimeter of triangle = a + b + c where a, b and c are the three lengths of the triangle.
This would be the perimeter of a rectangular prism formula:
Perimeter of rectangle: 2l + 2w where l is the length of the rectangle and w is the width.
Apply standard perimeter calculations to the base shape of the prism, and that gives you the perimeter.
Step-by-step explanation:
