Draw all possible lines of symmetry in each of the following figures and state the number of lines of symmetry in each case.

(i)

(ii)

(iii)

(iv)

Draw a regular octagon and draw all possible lines of symmetry in it.

Construct a triangle ABC such that BC = 6.5 cm and ∠B = ∠C = 70°. Draw all possible lines of symmetry.

Construct a triangle ABC having BC = 5 cm, ∠B = 90° and ∠C = 45°. Draw all possible lines of symmetry.