Practice the questions given in the worksheet on reflection in y-axis. The questions are based on how to find the co-ordinates of the image of a point under reflection in y-axis.
1. Find the reflection of the following in y-axis.
(i) (3, -7)
(ii) (-4, -6)
(iii) (-5, 7)
(iv) (3, 5)
2. Draw a line segment MN where M (3, 4) and N (5, 7). Reflect it in y-axis and find images of M and N. write the co-ordinates of M' and N'.
3. Draw a triangle ABC such that A (2, -3); B (5, 6); C (2, 5) are reflected in the y-axis to get the ∆ A'B'C'. write the co-ordinates of A', B' and C'.
4. Find the reflection of the following point in y-axis.
(i) A (3, 0)
(ii) B (0, 5)
(iii) C (-8, -2)
(iv) D (5, 1)
5. A parallelogram whose vertices are A (-2, 5), B (-5, 2), C (-5, -4), D (-2, -1) is reflected in y-axis to the parallelogram A'B'C'D'. Write the co-ordinates of the vertices of the parallelogram A'B'C'D'.
Answers for the worksheet on reflection in y-axis are given below to check the exact answers of the above questions on reflection of a point in the y-axis.
Answers:
1. (i) (-3, -7)
(ii) (4, -6)
(iii) (5, 7)
(iv) (-3, 5)
2. M' (-3, 4) and N' (-5, 7)
3. A' (-2, -3); B' (-5, 6); C' (-2, 5)
4. (i) A' (-3, 0)
(ii) B' (0, 5)
(iii) C' (8, -2)
(iv) D' (-5, 1)
5. A' (2, 5), B' (5, 2), C' (5, -4), D' (2, -1)
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