An image has Rotational
Symmetry if there is a centre
which the object is turned a certain number of degrees and
still looks the same, ie it matches itself a number of times
while it is being rotated.
this triangle will match itself
times as it is
rotated it is said to have rotational symmetry of
This flower has rotational
5 since it matches
all the toppings are placed
so evenly, this pizza has rotational symmetry of
carefully at the image on the left. Where is it from?
that it has rotational symmetry of order 2?
could you look to see if you have any images that
have rotational symmetry?
According to the New South Wales Mathematics Syllabus,
'... if an object only matches itself once...
considered to have rotational symmetry.'
can you make a teaching aid that demonstrates rotational using
paper, scissors and a thumb tack?