Tuesday 21 October 2014

Rotational symmetry

In your own words explain what rotational symmetry is.
Rotational symmetry is where you can have a shape and rotate it so that it can fit perfectly in the same position as when it started. However a full rotation does not count as rotational symmetry.

How is rotational symmetry different from line symmetry.
Line symmetry also known as reflection symmetry is different to rotational symmetry because it is where a picture is reflected to the other side of an image. The reflection does not have a certain direction it can go up,down or side, to side even diagonal. Rotation symmetry does not have a certain direction it just has to spin so that the shape is at its starting point.
What do you do to check if a shape has rotational symmetry?
You put a pin in the centre of a shape and rotate it so that it fits perfectly to the starting point without turning it a full rotation. If it does not fit perfectly on on e of the rotations it does not have rotational symmetry.

Find pictures of 3 real life objects which have rotational symmetry (not shapes, objects e.g. foods, logos) and paste them into your post





Complete this table

No comments:

Post a Comment