no rotational symmetry
60,120,180,240,300
I think 5
An equilateral triangle has six symmetries, and an isosceles triangle has two.
A decagon can have rotational symmetries of order 1, 2, 5 or 10.
Rotational symmetry of order 2. Reflection symmetry about the perpendicular bisectors of the sides.
An isosceles trapezoid has one rotational symmetry, which is a 180-degree rotation. This means that if you rotate the trapezoid by 180 degrees around its center, it will look the same as it did before the rotation. In addition to this, it has line symmetries, but regarding rotational symmetry specifically, there is only one.
A regular decagon, which has 10 equal sides and angles, has 10 rotational symmetries. These symmetries correspond to the decagon being rotated by multiples of (36^\circ) (360° divided by 10), including the identity rotation (0°). Therefore, the decagon can be rotated to match its original position in 10 different orientations.
No.
An isoceles triangle does not have rotation symmetry
A, B, then C
3
Yes