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Q. The perpendicular distance of the point $P(6,7,8)$ from $y z$ -plane is

Introduction to Three Dimensional Geometry

Solution:

Let $L$ be the foot of perpendicular drawn from the point $P(6,7,8)$ to the $y z$ -plane and the distance of this foot $L$ from $P$ is $x$ -coordinate of $P$, i.e., 6 units.