A figure has rotational symmetry when it can rotate onto itself in less than a full rotation.
A nonrectangular parallelogram has rotational symmetry, but not line symmetry. Additionally, shapes such as the letters S, N, and Z can be rotated to show rotational symmetry, although they do not have line symmetry.
A B C D E H K M U V W X Y * * * * * What? Most of these letters do not have rotational symmetry and so cannot have rotational AND line symmetry. Or did the meaning of AND change last night? The only upper case letters with both are H, I, O, X
Rotational symmetry of order 1.
A line has 180 degrees rotational symmetry.
A figure has rotational symmetry when it can rotate onto itself in less than a full rotation.
The letters H and Z have both line symmetry and rotational symmetry
H, I, O, and X have rotational symmetry.
7 have rot
A nonrectangular parallelogram has rotational symmetry, but not line symmetry. Additionally, shapes such as the letters S, N, and Z can be rotated to show rotational symmetry, although they do not have line symmetry.
4
A B C D E H K M U V W X Y * * * * * What? Most of these letters do not have rotational symmetry and so cannot have rotational AND line symmetry. Or did the meaning of AND change last night? The only upper case letters with both are H, I, O, X
There are 10 letters in the alphabet that achieve rotational symmetry when displayed in their capital form. These letters: A, H, I, M, O, U, V, W, X, and Y.
H,i,o,x
Mississippi
16 letters have line symmetry: A, B, C, D, E, H, I, K, M, O, T, U, V, W, X, Y 6 letters have rotational symmetry: H, I, N, O, S, X, Z 4 letters have both: H, I, O, X
A parallelogram has a rotational symmetry of 2!