What shape garden could Mr. Brown create?

Mr. Brown has 46 metres of fence. He is thinking of fencing a piece of land around the back of his house for a garden. What shape garden could Mr. Brown create?

Any shape he wants. Now, if you want it to be a polygon with integer sides, and one side of the garden is the back of the house, then it could bea triangle with sides 23 and 23 a rectangle with sides 6, 20, 20 or many other sizes, a pentagon with sides 16, 10, 10, 10 and so on.