### Home > INT2 > Chapter 11 > Lesson 11.1.2 > Problem 11-25

11-25.

Calculate the perimeter of each shape below. Assume the diagram in part (b) is a parallelogram.

This is a

- - triangle. The other side is therefore mm and the hypotenuse is mm.

The unknown sides both have the same length and are the hypotenuses of special right triangles which have the side ratio

- - .

in.