Final answer:
To find lengths EM and HD, use the Segment Addition Postulate, which requires adding up the lengths of subsegments on a line. We need specific measurements or a diagram to provide exact lengths.
Step-by-step explanation:
To find the lengths EM and HD using the Segment Addition Postulate, you need to have a figure with points E, M, H, and D identified on a line segment, or have measurements of the individual segments that make up the full segment between E and M or between H and D. The Segment Addition Postulate states that if B is between A and C, then AB + BC = AC. To find EM, the distance from E to M, you would add the lengths of the segments between E and M if they are given. To find HD, add the segment lengths between H and D if they are provided.
Without specific measurements or a diagram, it's impossible to provide the exact lengths of EM and HD. If the student provides the lengths of the subsegments or a diagram with those lengths, calculations can be performed to find EM and HD accordingly.