Draw a line Segment $PQ$ of length 5cm.Draw the line about which points $P$ and $Q$ are symmetric.

What is the image of a point in an axis of reflection symmetry? 

What is the image of a line segment in an axis of reflection symmetry?

The image of an equilateral triangle with side $4 \mathrm{cm}$ in an axis of reflection symmetry               

What is the image of a rectangle with length $4 \mathrm{cm}$ and breadth $3 \mathrm{cm}$ in an axis of reflection symmetry?      

In the adjoining figure, the point $B$ is the reflection of point $A$ in the reflecting line $m$ then $AB$ is _____ to $m$