Definition Of Image

The new position of a point, a line, a line segment, or a figure after a transformation is called its image.

Example of Image

In the example shown below, triangle A'B'C is the image of triangle A'B'C, after translation.
Points A'B'C are the images of points A, B, and C respectively.
The line segments A'B', B'C', and A'C' are the images of the original line segments AB, BC, and AC respectively.

Video Examples: Geometry: iCoachMath Works
 

Solved Example on Image

Ques: What would be the image of a polygon reflected over a line with respect to the original polygon? 

Choices:

A. Similar
B. Congruent 
C. Increase in size
D. None of the above
Correct Answer: B

Solution:

Step 1: A reflection flips the figure across a line. The new figure is a mirror image of the original figure.
Step 2: So, the image of the polygon reflected over a line is congruent with respect to the original polygon.

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