Making the lamp II- Homework for Monday

Hello everybody, this is what you have to bring done and finished, for Monday:

1.- Draw the following picture on a piece or cardboard (the outer circle should have a diameter of 30-35 cm. Not that it is really symmetrical, you can observe a better shot of the design in the second picture):

2.- Now cut it:

NOTE THAT YOU -STILL- NEED TO BRING CARDBOARD TO CUT OFF MORE PIECES ON MONDAY.