Thus, each point in space
has a fixed position. To specify the position of a point,
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its
perpendicular distance from the YZ plane must be determined (this gives
the x value of point P) |
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its
perpendicular distance from the XZ plane must be determined (this gives
the y value of point P) |
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its
perpendicular distance from the XY plane must be determined (this gives
the z value of point P) |
Point p is written P (x, y, z). Thus, for example,
if point P is
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3 units from the origin (zero
point) on the x axis, |
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2 units on the y axis and |
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1 unit on the z axis: |
it is written P(3, 2, 1).
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