Final answer:
The middle third of the span is located in the center of the line, following the first third and preceding the final third. It is a segment of the line that begins at approximately 33.33% and ends at approximately 66.66% of the total span.
Step-by-step explanation:
The question asks about locating the middle third of a span. The span can be visualized as a line divided into three equal parts, where each part represents a third of the whole line. The middle third would be the section in the center of this line, bounded by the first and the last thirds.
To determine where the middle third is located, we consider the entire line as 100% or the whole. If we divide this into three equal parts, each part represents approximately 33.33%. Starting from the beginning of the span, the first third would end at approximately 33.33%. The middle third follows, starting where the first third ends and continuing to approximately 66.66% of the span. Lastly, the final third would commence at approximately 66.66% and continue to the end of the span.
Therefore, the middle third of the span is found at the center of the line, between the first and the final thirds. It is also known as the middle third for obvious reasons, and it is bounded by the end of the beginning third and the start of the end third.