Thinking Skills: Critical Thinking and Problem Solving

3.9 Spatial reasoning 115

6    Some children are making decorations. A

square sheet of paper is folded along a

diagonal and then again so the two sharp

points meet, as shown. A cut is made

through all the layers of paper along the

dotted line shown and the small pieces

removed. The paper is then opened.

What does it look like? (Try to visualise it in

your head before you make a model to test

that your answer is right.)

A B

C D

E

Answers and comments are on page 321.

5    The solid shown, which is a cube with two

corners cut off, is made from a shaped

and folded piece of cardboard. (The dotted

lines represent edges which are hidden.)

Which of the following pieces of cardboard

will fold to make the shape? There may be

any number correct from none to four.

A B

C D