Which of the following numbers has exactly two lines of symmetry?
Among the given numbers, only 8 has exactly two lines of symmetry. 3 has only one line of symmetry whereas 5 and 6 have no lines of symmetry.
Can you draw a triangle which has
(a) exactly one line of symmetry?
(b) exactly two lines of symmetry?
(c) exactly three lines of symmetry?
(d) no lines of symmetry?
Sketch a rough figure in each case.