WHAT YOU NEED: squared paper, a pen, a ruler and a compass. ...then repeat step 2: draw another square on top, turn anti-clockwise 90° and keep repeating with the squares getting bigger and bigger ...

WHAT YOU NEED: a ruler, a compass and a pencil. STEP 2: Put the pin of a compass at the end of the line you want to bisect. Set the compass to more than half the length of the line, and draw an arc ...