Final answer:
The mid-segment of a triangle is indeed parallel to the base, but it is half the length of the base, not double.
Step-by-step explanation:
The statement about the mid-segment of a triangle, also known as the midline, being parallel to the base is true. However, the statement that it is double the length of the base is false. The mid-segment is half the length of the base of the triangle. This is because the mid-segment is created by connecting the midpoints of two sides of the triangle, which means it is parallel to the third side (the base) and has a length that is half that of the base, according to the properties of similar triangles.