The triangle that will always have at least 1-fold reflectional symmetry is the isosceles triangle. That is option D.
What is reflectional symmetry?
Reflectional symmetry is found in geometric shapes that can be folded over onto itself along a line.
The isosceles triangle has only one line of symmetry or 1-fold reflectional symmetry.
Therefore, the triangle that will always have at least 1-fold reflectional symmetry is the isosceles triangle.
Learn more about symmetry here:
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