Hello, fabxx!

In the figure below, points are equally spaced,

and points are equally spaced.

If , what is the perimeter of quadrilateral ?

Rotate the diagram 90°.Code:P o * * 3 * * 2 * * Q o * * * * * o A * 4 * 3 * * 2 * * R o * * * * * * * * * * * o B ?

We have:

joins the midpoints of two sides.

Hence, and

Therefore: .