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Question
Write the distance of the point (3, −5, 12) from X-axis?
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Solution
\[ \text { The distance of a general point } \left( x, y, z \right) \text{ from x - axis is } \sqrt{y^2 + z^2} . \]
\[ \therefore \text{ Distance of the point } \left( 3, - 5, 12 \right) \text{ from x - axis }= \sqrt{\left( - 5 \right)^2 + {12}^2} \]
\[ = \sqrt{169} \]
\[ = 13 \text{ units }\]
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