Page 15 - 01-Yr5_Front cover-ccp.indd

17
• Shapes from squares •
l1J a Copy the shape and cross below on to RM A.
b Trace them carefully.
c Line up the centres of rotation with a pin. ~:1·M~10._
d Rotate the tracing.
e Check that the tracing fits
the shape twice in a complete turn PAGE 25
f Complete:
This shape has rotational
symmetry of order ...
• centre of rotation
• Copy each shape and cross below on to RM A.
• Mork where you think the centre of rotation will be.
• Repeat 1 b to f for each shape.
o® "~

~ •Drow a diagram like this on RMA.
• Draw o!her patterns in each region.
• Mork the centre of rotation for each one.

rn

Practical: draw a decision tree and glue letters in the correct regions. a - e Practical: copy and trace a shape and chack its order of rotation.
f This shape has rotational symmetry of order 2.

Set of letters with half-turn symmetry but no line symmetry = {N, S, Z}
Practical: copy and trace two shapes, mark the centre of rotation and
~ check their order of rotation.

Set of letters with half-turn symmetry and line symmetry = {H, I, 0, X} Shape a: This shape has rotational symmetry of order 2.
Set of letters with line symmetry but no half-turn symmetry ~ {A, C, D, E, M, Shape b: This shape has rotational symmetry of order 4.
T, ul-v, w, Y}
Set of letters with no half-turn symmetry and no line symmetry = {B, F, G, J,
K, L, P, Q, R}
Open: draw a diagram and add further patterns.