Mathematics
The point P(2, 4) on reflection in the line y = 1 is mapped onto P'. Find the coordinates of P'.
Reflection
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Answer
We know that the reflection of the point (x, y) in the line y = a is the point (x, -y + 2a).
∴ The image of the point P(2, 4) under reflection in the line y = 1 is the point P'(2, -4 + 2 × 1) i.e., the point P'(2, -2).
The coordinates of the point P' is (2, -2).
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