Questions 6-10 are based on the following procedure.

Let's Make a Windmill

You will need:

• a sheet of paper
• a compass
• scissors
• glue
• a pin
• a wooden stick
• a fan

Steps:

1. Take a sheet of paper 30 cm x 30 cm in size.
2. Find the centre by folding the paper diagonally.
3. Now, with the help of a compass, draw a circle of 10 cm radius.
4. Cut along the dotted lines using the scissors.
5. Bring one part of each of the edges to the centre of the circle.
6. Stick together with glue.
7. Now pass a pin through the centre of the wheel and into a wooden stick.
8. The wind wheel is now ready to be used.
9. Place it in front of a fan and you will see the wind wheel rotating.

(Adapted from Experiment with Ecology, 2005)

Which part should be cut?