A, B, C, D, E, F, G, J, K, L, M, P, Q, R, T, U, V, W, Y.
A figure has rotational symmetry of order 1 only if it has to be rotated through 360 degrees before its image is congruent. In common usage, it has NO rotational symmetry.
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Rotational symmetry of order 1.
NO
Just 1.
Order 2.
An isosceles triangle has one line of symmetry, which is drawn from the noncongruent side to the opposite vertex, and does not have a rotation symmetry.