Question

find the distance of pont (a,b,c) from y-axis​

Answer 1

Foot of perpendicular will be ( 0,b,0)

apply distance formula

$\sqrt{(a - 0) ^{2} +(b - b) ^{2} + (c - 0 ^{2} } )$

then

$\sqrt({a ^{2} } + b ^{2} )$

so that is the ans.