The isosceles triangle has just one line of symmetry. So, option D is correct.
What is one line of symmetry?
This means that if you were to fold the shape along the line, both halves would match exactly. If you were to place a mirror along the line, the shape would remain unchanged.
Types of symmetries are rotational symmetry, reflection symmetry, translation symmetry, and glide reflection symmetry.
The line of symmetry for the given shapes:
- The rectangle has 2 lines of symmetry
- The circle has infinite lines of symmetry
- The equilateral triangle has 3 lines of symmetry
- The isosceles triangle has only one line of symmetry
Thus, the isosceles triangle has only one line of symmetry. So, option D is correct.
Learn more about the line of symmetry here:
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