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, it's not true that only regular polygons with an even number of sides are symmetrical. Regular polygons, regardless of whether they have an even or odd number of sides, are symmetrical. They possess rotational symmetry and reflectional symmetry; for example, a regular triangle (3 sides) and a regular pentagon (5 sides) both exhibit symmetry.
Yes. An equilateral triangle can be symmetrical because cut it straight down the middle and it will be symmertrical.
A regular triangle, also known as an equilateral triangle, has three lines of symmetry. Each line of symmetry runs from a vertex to the midpoint of the opposite side, dividing the triangle into two mirror-image halves. This symmetrical property reflects the equal length of all sides and angles in the triangle.
yes
yes
No, it is not.
Yes. An equilateral triangle can be symmetrical because cut it straight down the middle and it will be symmertrical.
No, all regular poygons are symmetrical. Ones with an odd number of sides have rotational symmetry.
Circle, ellipse, rectangle, square, parallelogram, rhombus, trapezoid, isosceles triangle, equilateral triangle, any regular polygon.
Yes, a right triangle is symmetrical.
yes
yes
a triangle is not regular
Usually, no; but exceptionally, yes.
No.
all regular polygons
Yes. Regular polygons with an odd number of sides are also symmetrical.