Q: How many lines of symmetry does a isosceles triangle have?

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one

One

If it is an equilateral triangle then it has 3 lines of symmetry. If it is an isosceles triangle then it has 1 line of symmetry

An isosceles triangle has only one line of symmetry

1 - through the vertex

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An isosceles triangle has only 1 line of symmetry.

An isosceles triangle has 1 line of symmetry

an isosceles has only 1 line of symmetry

one

One

If it is an equilateral triangle then it has 3 lines of symmetry. If it is an isosceles triangle then it has 1 line of symmetry

An isosceles triangle has only one line of symmetry

One.

only one.

None. A isosceles triangle has one line of symmetry and a equilateral triangle has three.

That depends on what type of triangle it is because an equilateral triangle has 3 lines of symmetry whereas an isosceles triangle has only 1 line of symmetry and any other triangles have no lines of symmetry.

Any isosceles triangle that is not also equilateral has exactly one line of symmetry.