nothing just look in a book u lazy
pig
a reflection
There is only one line of symmetry in an isosceles triangle. If you draw this triangle with the "odd" side as the base and then bisect it with a vertical line, you will have that one line of symmetry. The triangle can be folded in half along this line because each side is a mirror of the other.
An isosceles triangle has exactly one line of symmetry, which runs vertically through the vertex opposite the base and bisects the base in half. This line divides the triangle into two mirror-image halves. Other types of triangles, such as equilateral triangles, have more lines of symmetry, but an isosceles triangle specifically has just this one.
Triangle, trapezoid
An isosceles triangle has one line of symmetry, which is the vertical line that runs from the apex (the vertex opposite the base) down to the midpoint of the base. This line divides the triangle into two mirror-image halves. Unlike an equilateral triangle, which has three lines of symmetry, an isosceles triangle only has this single line due to its two equal sides.
An isosceles triangle has one line of symmetry. This line of symmetry runs vertically down from the apex (the top vertex) to the midpoint of the base, dividing the triangle into two mirror-image halves. The two equal sides are symmetrical with respect to this line, while the base is not symmetrical.
It has just one line of symmetry
An Isosceles triangle has at least one line of symmetry but if it has more than one line of symmetry it can be an Equilateral triangle as well as a Isosceles Triangle. So a triangle with one line of symmetry is always Isosceles and If it has more than one it is always an Equilateral triangle as well as an Isosceles triangle. Example of an Isosceles triangle:
An equilateral triangle and an isoceles triangle have one line of symmetry.
An isosceles triangle
Here are just some: Triangle, trapezoid, cone
An isosceles triangle