An isosceles triangle has one line of symmetry. This line runs vertically through the apex (the top vertex) and bisects the base, dividing the triangle into two congruent halves. The two equal sides reflect across this line, demonstrating the symmetry.
It has 1 line of symmetry
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It has 1 vertical line of symmetry
An isosceles triangle has 1 line of symmetry
an isosceles has only 1 line of symmetry
An isosceles triangle has only 1 line of symmetry.
It has one line of symmetry
It has 1 line of symmetry
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It has 1 line of symmetry
It has 1 vertical line of symmetry
It has 1 vertical line of symmetry
A trapezoid has no lines of symmetry unless it is in the form of an isosceles trapezoid which has one line of symmetry