5 is the answer
A triangle has 3 sides and if two sides are equal then it's an isosceles triangle with one line if symmetry but if all sides are equal then it's an equilateral with three lines of symmetry.
Well since isosceles can only have two equal angles and two equal sides and a triangle has 3 angles and 3 sides it can really only have 1 line of symmetry.
It has 1 line of symmetry
A regular decagon has 10 lines of symmetry. Each line of symmetry can be drawn through a vertex and the midpoint of the opposite side, as well as through the midpoints of two opposite sides. This symmetry reflects the decagon's equal angles and sides, allowing for multiple symmetrical divisions.
One - from the vertex between the sides of equal length to the centre of the opposite side.
A regular polygon with x sides has x lines of symmetry. Each line of symmetry passes through a vertex and the midpoint of the opposite side. For example, a regular hexagon has 6 lines of symmetry, one for each pair of opposite sides. The formula for calculating the number of lines of symmetry in a regular polygon is equal to the number of sides x.
Isosceles triangle, kite. -improvement: an isosceles triangle actually has three lines of symmetry, equal to the number of sides. It is easy to design irregular polygons with an odd number of sides that have just one line of symmetry. A parabola. Many more functions that are more complex - cardioid, for example.
The number of lines of symmetry of a triangle depends upon the kind of triangle it is:A scalene triangle with no side lengths equal has no lines of symmetry;An isosceles triangle with two sides equal has 1 line of symmetry that bisects the angle between the two equal sides;An equilateral triangle with all three sides equal has three lines of symmetry - the three lines are the bisectors of the three angles.A right triangle is a triangle where one angle is 90°. A right triangle is either a scalene triangle with no lines of symmetry or an isosceles triangle (where the legs are of equal length) with one line of symmetry which bisects the 90° angle.No triangle can have exactly 2 lines of symmetry.
The Olympic rings have 2 lines of symmetry. A line of symmetry is a line that divides a shape into two equal halves that are mirror images of each other. In the case of the Olympic rings, there are two lines of symmetry that run horizontally and vertically through the center of the rings, dividing them into equal halves.
A regular 20-gon has 20 lines of symmetry. Each line of symmetry can be drawn through a vertex and the midpoint of the opposite side, or through the midpoints of two opposite sides. This symmetry reflects the polygon's regularity, as all sides and angles are equal.
22
There is only one in a trapazoid because if you look at it there is only one line that can be cut to have both sides equal