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i rilly dont no is it (n-2)*180?? <--- that's actually for finding the Interior Angles for geometry.

the way I remember rotational symmetry is as follows:

each shape has to add up to 360 degrees, so you take that and divide it by the number of sides of the shape. Then, you keep adding that answer till you come get to 360.

Example:

The rotational symmetry for an Octagon:

360/8 = 45

45 + 45 = 90

90 + 45 = 135

135 + 45 = 180

180 + 45 = 225

225 + 45 = 270

270 + 45 = 315

315 + 45 = 360

The degrees for Rotational Symmetry are: 45, 90, 135, 180, 225, 270, 315, and 360.

Hope that helps, because it's what helps me.

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13y ago

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