Points , and lie in the same horizontal plane. Which of the segments , or is the…

MATHEMATICS · Subjective · CBSE · Mathematics · Introduction to Three-Dimensional Geometry · Introduction to Three-Dimensional Geometry

Problem

Points

P(1, -2, 3)

Q(5, 1, 3)

and

R(-2, 4, 3)

lie in the same horizontal plane. Which of the segments

PQ

QR

PR

is the longest? Give its length.