Ptolemy's Ptools

How to Make a Quadrant:

1) Print this page on your printer

2) Cut out the quadrant scale below

3) Glue the scale onto particle-board (like the back of a note pad) & cut the board down to the shape of the scale (outer perimeter only)

4) Glue the FOLDED edge (dashed line) onto your meterstick, a little less than the distance from the "0" end as your arm is long (so you can reach it while holding the "0" end up to your eye)

5) Glue one end of a 30 cm. (1ft) long string to the orange circle & tie a weight to the other end of the string

Using a Quadrant

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(last updated 8/31/98)