One.
None, normally. One if it is an isosceles trapezium.
It has 1 vertical line of symmetry
It has 1 vertical line of symmetry
Only one line of symmetry, it is the line that contains the median of the isosceles triangle (that passes through the vertex and perpendicular to the base).
a rhombus has no lines of symetry
2 lines of Symetry
A trapezium has two diagonals.
1
A trapezium can have either 0 or 1 line of symmetry, depending on its specific shape. If the trapezium is a parallelogram, it will have one line of symmetry, which is the line that divides the shape into two equal halves. However, if the trapezium is not a parallelogram, it will have no lines of symmetry, as there is no way to divide it into two equal halves through a single line.
An equilateral triangle has 3 lines of symmetry whereas an isosceles triangle only has 1 line of symmetry and other triangles have no lines of symmetry.
Usually none. But one in an isosceles trapezium.
A regular octogan has 8 lines of symetry, and a irregular octogan has 2 lines of symetry.