Question

Select the shape that is divided into mirror halves about the line.

Answer 1

If the halves are exactly similar to each other and have the same features, then both the halves are called mirror halves.

$\bullet$ When one half of $\underset{–}{shapeA}$ is compared to the other, we find that both halves have different features, lengths, widths, etc. Both halves are not mirror halves.

$\bullet$ The halves of $\underset{–}{shapeB}$ are exactly similar to each other. Both halves of the shape can exactly overlap on each other. Thus, both halves represent mirror halves.

$\bullet$ When one half of $\underset{–}{shapeC}$ is compared to the other, we find that both halves have different features. Both halves are not mirror halves.

$\bullet$ When one half of $\underset{–}{shapeD}$ is compared to the other, we find that both halves have different features. Both halves are not mirror halves.

Hence, only $\underset{–}{shapeB}$ is divided into mirror halves.