Flexi answers - How many lines of symmetry does a triangle have
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A scalene triangle has 0 lines of symmetry. An isosceles triangle has only 1 line of symmetry. An equilateral triangle has a maximum number of reflection symmetry equal to 3. Hence, it has three line of symmetry. To learn more about reflection-symmetry, click here!
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Illustrative Mathematics
What are the lines of symmetry in triangles? - Quora
What are the lines of symmetry in triangles? - Quora
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GraphicMaths - Line symmetry
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Find the number of lines of symmetry for each of the following shapes