All other shapes have more than one line of symmetry, so the shape that has exactly 1 line of symmetry is a triangle.
The line of symmetry can be defined as the axis or imaginary line that passes through the center of the shape or object and divides it into identical halves.
A line of symmetry is a line that splits a shape in half perfectly. This indicates that the two halves will be perfectly aligned if you fold the form along the line.
All other shapes have more than one line of symmetry.
The line of symmetry of a triangle is a vertical line drawn from the top point to the midpoint of the base.
Hence, the shape that has exactly 1 line of symmetry is a triangle.
Learn more about lines of symmetry here;
https://brainly.com/question/109377
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