Mathematics
Grade9
Easy

Question

What is the line of reflection for triangle A B C and its image?

  1. x-axis
  2. y-axis
  3. y = x
  4. y = -x

hintHint:

Measure distance between the points and then compare the distances to obtain the line of reflection.

The correct answer is: y-axis


    * In Geometry, a reflection is known as a flip. A reflection is a mirror image of the shape. An image will reflect through a line, known as the line of reflection.
    *It is a type of transformation that produces mirror image of the shape.
    Given That:

    >>>From graph:
    The points of reflection for the vertices of a triangle A(2,3);B(6,1);C(7,5) are A'(-2,3);B'(-6,1);C'(-7,5).
    >>>Therefore, the y-coordinates of a points remains same and the x-coordinates of a points changing it's sign with same magnitude.
    >>>Let, (a, b) be a point in the plane then the point of reflection has (-a, b) when it is reflected on y-axis.
    >>>Hence, we can say that the line of reflection is y-axis.

    From the graph, the line of reflection is y-axis.

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