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(i) Point P (a, b) is reflected in the x-axis to P’ (5, -2). Write down the values of a and b. (ii) P” is the image of P when reflected in the y-axis. Write down the co-ordinates of P” - Mathematics

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(i) Point P (a, b) is reflected in the x-axis to P’ (5, -2). Write down the values of a and b.

(ii) P” is the image of P when reflected in the y-axis. Write down the co-ordinates of P”.

(iii) Name a single transformation that maps P’ to P”.

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Solution

(i) We know Mx (x, y) = (x, -y) P’ (5, -2) = reflection of P (a, b) in x-axis. Thus, the co-ordinates of P are (5, 2). Hence, a = 5 and b = 2.

(ii) P” = image of P (5, 2) reflected in y-axis = (-5, 2)

(iii) Single transformation that maps P’ to P” is the reflection in origin.

Concept: Invariant Points.
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APPEARS IN

Selina Concise Maths Class 10 ICSE
Chapter 12 Reflection
Exercise 12 (B) | Q 3 | Page 170
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