The number of lines of symmetry in a $$ 30^{\circ}$$-$$60^{\circ}$$-$$90^{\circ} $$ set square is
Correct option is A. 0
The number of lines of symmetry in a $$ 30^{\circ}$$-$$60^{\circ}$$-$$90^{\circ} $$ set square is zero because it has shape of an scalene right-angled triangle
Hence, option A is the right answer.