No.
yes * * * * * Usually, no. Only isosceles right angled triangles have a line of symmetry.
It can have a line of symmetry but most have none. Not necessarily. In most cases it would have none.
0 zip zilch nada none
No such thing as a regular triangle. You need to be more accurate in your triangular description. Equilateral triangle is symmetric about three lines of symmetry. Isosceles triangle is symmetric one line of symmetry. Right-angled, and Scalene triangles have no lines of symmetry.
No.
yes * * * * * Usually, no. Only isosceles right angled triangles have a line of symmetry.
None.
A scalene triangle that is not right angled.
None normally but if it is a right angle isosceles triangle it will have 1 line of symmetry
None.
it has only one line of symmetry.
This could be either an isosceles triangle or a right angled triangle.
I think none. In fact the only triangle that I believe has any rotational symmetry is an equilateral triangle.
3
For a right isosceles triangle (45-45-90), there is one line of symmetry that bisects the hypotenuse. For all other right triangles, there are zero lines of symmetry.
It can have a line of symmetry but most have none. Not necessarily. In most cases it would have none.