Final answer:
Segment DC can be measured using a ruler or measuring tape if it represents a distance, or using specialized instruments like voltmeters or ammeters if it represents an electrical parameter.
Step-by-step explanation:
In order to determine the measurement of segment DC, we need more information about the context or diagram involving segment DC. Without this information, we cannot provide a specific measurement. However, if segment DC represents a distance or length on a line, it can be measured using a ruler or a measuring tape. If segment DC represents an electrical parameter, such as voltage or current, it may require specialized instruments like a voltmeter or an ammeter to measure it accurately.