Question

In the given figures, the mirror (i.e., the line of symmetry) is given as a dotted line. Complete each figure performing reflection in the dotted (mirror) line. (You might perhaps place a mirror along the dotted line and look into the mirror for the image). Are you able to recall the name of the figure you complete?

Answer 1

Hint: Consider each line in the given figure apart from the dotted line as an object and take the reflection of these lines in the dotted (mirror) line. The reflection of all the lines in the dotted (mirror) line will complete this half figure given in the question and after completion of the figure, see which figure we have got.

Complete step-by-step answer:
In the below figure, a dotted line is shown along with a figure ABC is also shown.

We are asked to complete this figure. This figure will be completed when we take the reflection of the figure ABC given in the question in the dotted (mirror) line.
In the figure above, the dotted line is treated as a mirror and the figure ABC is treated as an object. Now, we are taking the reflection of this object ABC in the dotted (mirror) line.

In the above figure, CB’ is the reflection of CB and AB’ is the reflection of AB. So, the figure that we have got after reflection in the dotted (line) mirror apart from the given figure ABC is AB’C.
And the complete figure after reflection is ABB’ which we can see is a triangle.
Hence, the figure that we have completed ABB’ is a triangle.
Note: There cannot be any other figure possible other than ABB’ because the reflection of CB’ is CB and the reflection of AB’ is AB so if we reflect CB’ and AB’ in the dotted (mirror) line we will get CB and AB respectively which is the original figure ABC.