Reflection of the pointegral (( a , ? , ? )) in (XY) plane i... | Mathematics | SolveeIt

Question

Reflection of the point $( a , ? , ? )$ in $XY$ plane is

$( a , ? , 0 )$

$( 0 , 0 , ? )$

$( - a , - ? , ? )$

$( a , ? ,- ? )$

Answer

$( a , ? ,- ? )$

Explanation

Solution

Reflexion of any point $(x, y, z)$ in $X Y$ -plane is $(x, y,-z)$
$\therefore$ Reflexion of $(\alpha, \beta, \gamma)$ in $X Y$ -plane is $(\alpha, \beta,-\gamma)$

Mathematics Question on introduction to three dimensional geometry

Solution