A ruler measuring 1 foot is 12 inches long. When it is bisected, it is divided into two equal segments.
To find the length of each segment, we can simply divide the total length by 2:
12 inches / 2 = 6 inches.
Thus, each segment of the bisected ruler is 6 inches long.
None of the provided responses (4 inches, 3 inches, or 0.5 inch) are correct for the length of each segment.