Draw a triangle which has exactly three lines of symmetry.

Write the number whose $18\%$ is $108$.

The perimeter of the figure is 

A wire in the shape of a square of area 36 cm square is reshaped into rectangle whose breadth is 4 cm. The area of the rectangle formed is $a c{m}^2$. Find the value of $a.$

Using compasses, construct an angle of 120. Also construct its line of symmetry. What is the special name given to this line of symmetry?