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• Nets for square prisms • • • • •••••• AME or H, programmable robot with pen
{e.g. ROAMER, Pt? or LOGO turtle)
~:I•I•J:41fJ~ This is a net for a square prism . This is a different net for the square prism on page 10. ~:tot i:41a~
0
Each face is a different colour.
PAGE 10 PAGE 11

3 Try to draw the net above. Follow these rules.
• Your pencil must not leave the page.
• You must not go over the some line twice.
Start like this:

rn Design a program for your robot
to draw the net in the way you did in 3 .
The program could start like this·
FORWARD 1
RIGHT 90
FORWARD 1
LEFT 90
2 • Choose materials to construct
a square prism with a volume less than 48 cm 3
• Colour each face a different colour CHALLENGE
before you make up the net.
• Design as many other nets for this square prism as you con.
• Now draw different views of your prism
on RME or H. • Which ones can be drawn following the two rules in 3 ?
Here is one example (not full size). • Design programs for your robot to draw them.
m
rn

a yes b no c no d no e no f no Practical: designing a program for a robot to draw the net in ~ .

Challenge
Open: designing other nets for the square prism and investigating whether
Practical: constructing a square prism, colouring faces and drawing
they can be drawn following the rules in ~- Designing programs to draw
different views.
the nets.

One possible way to draw the net following the rules is:

3 2~ J. Start 17
4
6E 13 14 ;1~ ~Finish : J 18
I
12
7 la 11 1q
.....
q