Question

Find the distance of the point (2, 3, 4) from the x-axis.

Answer 1

$$\begin{gathered} \mathrm{A}\mathrm{general}\mathrm{point}(x,y,z)\mathrm{is}\mathrm{at}\mathrm{a}\mathrm{distance}\mathrm{of}\sqrt{y^2+z^2}\mathrm{from}\mathrm{the}\mathit{}x-\mathrm{axis}. \\ \therefore \mathrm{Distace}\mathrm{of}\mathrm{the}\mathrm{point}(2,3,4)\mathrm{from}x-\mathrm{axis}=\sqrt{3^2+4^2}=\sqrt{25}=5\mathrm{units} \end{gathered}$$