# How many sides does a pentagon have?

mrs-campbell | High School Teacher | (Level 1) Educator Emeritus

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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!

melissa1106 | Student, Grade 11 | (Level 1) Salutatorian

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A pentagon has five sides to it. The root word penta- is Latin for five so pentagon means five sided figure. Tri- is 3, quad- is 4, penta- is 5, hexa- is 6, hepta- is 7, octo is 8, Nona is 9, deca is 10 and dodeca is 12 and so on.

ik9744 | Student, Grade 9 | (Level 1) Valedictorian

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Pentagon = 5 sides.

jess1999 | Student, Grade 9 | (Level 1) Valedictorian

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A pentagon has five sides , the root word " penta " also means five . Other polygons have these root words to help too . For example, a triangle has 3 sides , and tri = 3 ; A quadrilateral has 4 sides , and quad = 4 .

nisarg | Student, Grade 11 | (Level 1) Valedictorian

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A pentagon has exactly 5 sides

triangle- 3 sides

pentagon- 5 sides

hexagon- 6 sides

heptagon- 7 sides

and so on and so forth

laurto | Student, Grade 10 | (Level 1) Valedictorian

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A pentagon has 5 sides. penta means 5.

here's something my chemistry teacher told us to help us remember how many sides a shape has.

1 mono

2 di

3 tri

4 tetra

5 penta

6 hexa

7 hepta

8 octa

9 nona

10 deca

zumba96 | Student, Grade 11 | (Level 3) Valedictorian

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A pentagon has five sides. The greek root "penta" means 5 as well just as the greek root "Octo" equals 8. Therefore a pentagon has 5 sides