It pays to know that a credit card is 3 3/28 by 2 1/8 inches; a business card is generally 3 5/8 x 2 inches. We've mentioned the dollar bill ruler tip before, but now you can use other items in ...

Use these to construct a triangle when you know the length of 1 side ... to 5 cm. Place the compass at the other end of the line and draw an arc that crosses the first arc. Use the ruler to ...