Copy the triangle in each of the following figures on squared paper. In each case, draw the line(s) of symmetry, if any and identify the type of triangle. (Some of you may like to trace the figures and try paper-folding first!)
(a) 
(b) 
(c) 
(d) 
(a) At first,
We have to copy the figure,
And, then
We have to draw the line of symmetry if present.
Thus,
Hence,
We can observe that,
There is only one line of symmetry
Therefore,
It is an iscoceles triangle.
(b) At first,
We have to copy the figure,
And, then
We have to draw the line of symmetry if present.
Thus,
Hence,
We can observe that,
There is only one line of symmetry
Therefore,
It is an iscoceles triangle.
(c) At first,
We have to copy the figure,
And, then
We have to draw the line of symmetry if present.
Thus,
Hence,
We can observe that,
There is only one line of symmetry
And,
An angle is right angled
Therefore,
It is a right-angled iscoceles triangle.
(d) At first,
We have to copy the figure,
And, then
We have to draw the line of symmetry if present.
Thus,
Now,
We can observe that there is no line of symmetry possible in the figure.
Hence,
The given triangle is a scalen triangle.