Mathematics
Find the image of each of the following points under reflection in the line x = 0 :
(i) (4, 7)
(ii) (-3, -5)
(iii) (-8, 6)
(iv) (5, 0)
(v) (0, -2)
Reflection
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Answer
x = 0 is the equation of y-axis.
Hence, reflection in the line x = 0 means reflection in y-axis.
Reflection in y-axis is given by,
Ry (x, y) = (-x, y).
(i) Thus,
Ry (4, 7) = (-4, 7).
Hence, co-ordinates of (4, 7) under reflection in the line x = 0 are (-4, 7).
(ii) Thus,
Ry (-3, -5) = (3, -5).
Hence, co-ordinates of (-3, -5) under reflection in the line x = 0 are (3, -5).
(iii) Thus,
Ry (-8, 6) = (8, 6).
Hence, co-ordinates of (-8, 6) under reflection in the line x = 0 are (8, 6).
(iv) Thus,
Ry (5, 0) = (-5, 0).
Hence, co-ordinates of (5, 0) under reflection in the line x = 0 are (-5, 0).
(v) Thus,
Ry (0, -2) = (0, -2).
Hence, co-ordinates of (0, -2) under reflection in the line x = 0 are (0, -2).
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Related Questions
Find the image of each of the following points under reflection in y-axis :
(i) (2, 6)
(ii) (-3, 8)
(iii) (-5, -3)
(iv) (0, -1)
(v) (4, 0)
Find the image of each of the following points when reflected in the origin :
(i) (-5, 8)
(ii) (-6, -4)
(iii) (7, 4)
(iv) (9, 0)
(v) (0, 7)
Find the image of each of the following points under reflection in the line y = 0 :
(i) (6, -7)
(ii) (-8, 4)
(iii) (-3, -8)
(iv) (7, 9)
(v) (0, -6)
The point P(-6, -3) on reflection in y-axis is mapped on P'. The point P' on reflection in the origin is mapped on P".
(i) Find the co-ordinates of P'.
(ii) Find the co-ordinates of P".
(iii) Write down a single transformation that maps P onto P".