A pentagon has five sides. If you look at the word itself, the root is "penta", which translates roughly to mean five. It is from the greek word "pente," which means five. If you look at all the of the shapes in geometry, the words that describe them often have clues to how many sides that they have. For example, a triangle has the root of "tri," which means three. A hexagon has the root of "hexa," which means six. An octagon has eight sides, related to "octo," which means eight.

I remember the differences between them all through connections. Octopuses have 8 arms, right? So, an octagon has 8 sides. And, for a pentagon, I think of a fist, pent up in rage (silly, I know, but this is how I remember things), and fists have five fingers, right? Hexagons are easier to remember because Hex has an "x" in it, just like a six does.

Good luck!

## We’ll help your grades soar

Start your 48-hour free trial and unlock all the summaries, Q&A, and analyses you need to get better grades now.

- 30,000+ book summaries
- 20% study tools discount
- Ad-free content
- PDF downloads
- 300,000+ answers
- 5-star customer support

Already a member? Log in here.

Are you a teacher? Sign up now