What would be the coordinates of mirror image of point (4.-1) w.l.t. x-axis?
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Join the points (-3,0), (0, 0) and (0, 3) in an order. Name the shape you get after joining the points.
2
3
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3.3 FILL IN THE BLANKS
A vertical line drawn in a cartesian plane is known as
Point of intersection of the axes is called as
ax + b = 0, a#0 is general form of a
equation in one variable.
Abscissa of a point on y-axis is
Point (2, 0) lies on .......... axis.
Perpendicular distance of (-2, 3) from x-axis is
Equation of x axis is ...
Coordinates of origin are .....
Special name given to x-coordinate of an ordered pair is
The coordinate axes divides a plane into ....... parts, each part is known as
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Answers
Answer:
I. mirror image of (4,-1) about x axis is (4,1)
Step-by-step explanation:
When point M is reflected in x-axis, the image M’ is formed in the fourth quadrant whose co-ordinates are (h, -k). Thus we conclude that when a point is reflected in x-axis, then the x-co-ordinate remains same, but the y-co-ordinate becomes negative.
Thus, the image of point M (h, k) is M' (h, -k).
1. Write the co-ordinates of the image of the following points when reflected in x-axis.
(i) (-5 , 2)
(ii) (3, -7)
(iii) (2, 3)
(iv) (-5, -4)
Solution:
(i)The image of (-5 , 2) is (-5 , -2).
(ii) The image of (3, -7) is (3, 7).
(iii) The image of (2, 3) is (2, -3).
(iv) The image of (-5, -4) is (-5, 4).
2. Find the reflection of the following in x-axis:
(i) P (-6, -9)
(ii) Q (5, 7)
(iii) R (-2, 4)
(iv) S (3, -3)
Solution:
The image of P (-6, -9) is P' (-6, 9).
The image of Q (5, 7) is Q' (5, -7) .
The image of R (-2, 4) is R' (-2, -4) .
The image of S (3, -3) is S' (3, 3) .
Do it in the same way