What is the distance of point (8, 3, 2) from the yz-plane?
The equation of the yz-plane is x = 0. Therefore, the distance of a point (x, y, z) from the yz-plane is the absolute value of its x-coordinate, |x|. For (8, 3, 2), the distance is |8| = 8 units. The value 3 is the y-coordinate, so it gives the distance from the xz-plane, not the yz-plane. Exam tip: for the yz-plane, always use the x-coordinate.
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