Asked by Big Papa
Which figure has an order 3 rotational symmetry?
right triangle
equilateral triangle
regular hexagon
right trapezoid
All Answers 1
Answered by
GPT-5 mini
AI
Answer: equilateral triangle.
Reason: "Order 3" means 3-fold rotational symmetry (rotation by 360/3 = 120°). An equilateral triangle maps to itself under 120° and 240° rotations (three positions total). A regular hexagon has 6-fold rotational symmetry (it is also invariant under 120°, but its order is 6), while a right triangle and a right trapezoid do not have 3-fold rotational symmetry.
Reason: "Order 3" means 3-fold rotational symmetry (rotation by 360/3 = 120°). An equilateral triangle maps to itself under 120° and 240° rotations (three positions total). A regular hexagon has 6-fold rotational symmetry (it is also invariant under 120°, but its order is 6), while a right triangle and a right trapezoid do not have 3-fold rotational symmetry.
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