What is the inverse of the following conditional statement?

"If the sum of interior angles of a polygon is more than 180°, then the polygon is not a triangle."

If the sum of the interior angles of a polygon is not more than 180°, then the polygon is a triangle.
If the polygon is a triangle, then the sum of the interior angles of the polygon is not more than 180°.
If the sum of the interior angles of a polygon is equal to 180°, then the polygon is a triangle.
If the polygon is not a triangle, then the sum of the interior angles of the polygon is more than 180°.

If the polygon is not a triangle, then the sum of the interior angles of the polygon is more than 180°.