Question

Write the reflection of the point alpha beta gamma

Answer 1

metry

The reflection of the point (α,β,γ)(α,β,γ) in the xy-plane is

(A)(α,β,0)(B)(0,0,γ)(C)(−α,−β,γ)(D)(α,β,−γ)(A)(α,β,0)(B)(0,0,γ)(C)(−α,−β,γ)(D)(α,β,−γ)

cbse

 

class12

 

ch11

 

q33

 

p238

 

objective

 

exemplar

easy

 

sec-a

 

math

  

 

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asked Jan 4, 2013 by sreemathi.v 
edited Jun 12, 2013 by meena.p



1 Answer

Toolbox:

The reflexion of the points in the xy palne. here the sign of the z coordinate changes.

The given point is (α,β,−γ)(α,β,−γ)

The reflexion of the points in the xy palne. where the sign of the z coordinate changes.

Hence the reflexion of the point (α,β,γ)(α,β,γ) in the xy plane is (α,β,−γ)(α,β,−γ)

The correct option is D