The given point is (a,b,c).
The distance of the point (a,b,c) fromx-axis will be the perpendicular distance from point (a,b,c) tox-axis whose co-ordinates will be (a, 0, 0)
[∵ onx-axis,yandz co-ordinates will be zero]
∴ By distance formula
Distance = ( a a ) 2 + ( b 0 ) 2 + ( c 0 ) 2 = b 2 + c 2 " src="https://s3mn.mnimgs.com/img/shared/discuss_editlive/1915355/2012_03_19_10_50_48/mathmlequation6559523045446844919.png" style="margin: 0px; padding: 0px; border: 0px; max-width: 550px;" /
