On tracing given figures, we get the following figures
There are four lines of symmetry.

On tracing given figures, we get the following figures
There are four lines of symmetry.

Here, the given triangle is scalene triangle. So, this is not the symmetrical figure. Therefore, there is no line of symmetry.

Here, the given triangle is an isosceles right angled triangle and one angle is 90° and its line of symmetry is l₁.

Given figure

Here, l_1,l₂,l₃,l₄,and l₅ are five lines of symmetry.

Given figure

Here, l_1,l₂,l₃,l₄,l₅ and l₆ are six lines of symmetry.

Given figure

Here, l_1,l₂,l₃ and l₄ are four lines of symmetry.

A semi-circle has only one line of symmetry.

4

2

We know that, the object and its image are symmetrical with reference to the mirror line. If we are 100 cm in front of a mirror, then our image appears to be 100 cm behind the mirror. If we move towards the mirror, then our image also appears to come closer.

Symmetry is an attribute where something is the same on both sides of an axis.

This figure has two lines of symmetry.

It is a symmetrical figure and its line of symmetry is shown below:

We know that, if we fold a picture in half, such that the left and right halves match exactly, then the picture is said to have line of symmetry or mirror line. Here, if we fold the picture about I₂ then the left and right halves match exactly. So, I₂ is the mirror line.