8.58 Chapter 8Checkpoint
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In each of the following, put '✓' in if it is correct, and '✗' if it is wrong.
1. The x-axis is a horizontal number line in the rectangular coordinate plane.
2. The y-coordinates of the points lying on the y-axis must be 0.
3. The point (4 , -3) lies on the left of the point (6 , -3).
4. The line passing through the points (6 , 2) and (-1 , 2) is a vertical line.
5. The distance between the two points (4 , -8) and (4 , -5) is -3 units.
Refer to Fig. A. [Nos. 6-8]
6. The coordinates of point S are (2 , 7).
7. The length of PQ is 6 units.
8. The area of 3PQR is 48 sq. units.
9. The point (-2 , 3) is translated 4 units upwards. The coordinates of
the image are (-2 , 7) .
10. The point (4 , -5) is reflected in the y-axis. The coordinates of the
image are (4 , 5).
11. A point is reflected in a horizontal line. The x-coordinates of the
point and its image are the same.
12. The point (-2 , -1) is rotated anticlockwise about the origin
through 270c. The coordinates of the image are (1 , -2).
y
x
-4-3-2-1 10
1
2
3
4
5
6
7
2 3 4 5
Q
P S
R
Fig. A
✓
✓
✗
✓
✗
✗
✓
✓
✗
✓
✗
✗