Not necessarily, except rotational symmetry of order 1.
No.
a right triangle
a triangle has 0 lines of symmetry.
0 lines of symmetry
caca
3
I think none. In fact the only triangle that I believe has any rotational symmetry is an equilateral triangle.
No.
a right triangle
None.
None.
Well, honey, a right triangle does not have rotational symmetry because if you try to rotate it by any angle other than 90 degrees, it won't look the same. So, unless you're planning on spinning that triangle like a disco ball at a 70s party, you won't find any rotational symmetry there.
a triangle has 0 lines of symmetry.
0 lines of symmetry
equilateral triangle
No triangle has two lines of symmetry. A right triangle and an Isoscoles triange each have one line of symmetry, and an equilateral triangle has three.
None normally but if it is a right angle isosceles triangle it will have 1 line of symmetry