# Draw an Archimedean Spiral

An Archimedean spiral (also known as an arithmetic spiral) is defined by the path of a point that gets farther from a fixed point at a constant rate as it rotates about the fixed point with a constant angular velocity. A string wrapped around an object unwinds in an Archimedean spiral.

## Materials

- Cardboard

- String

- Tape

- Pen or marker

## Steps

- Tape a piece of paper onto a piece of cardboard.

- Push a pencil up through the cardboard and piece of paper and tape it in place if necessary.

- Tape a piece of string to the pencil and tie a loop at the end of the string.

- Wind the string onto the pencil and hook the tip of the pen into the loop.

- Keeping the string taut, draw the spiral as you move your pen around the pencil.