# What is the correct term for a shape...

Discussion in 'Mathematics' started by amyclare, Nov 11, 2011.

1. ### amyclare

that is not any other recognised shape? As in, a rather random mix of straight and curved sides. Is it just an irregular polygon or is there another term?

I'm doing shape with Yr 1 next week and want to get it right. I can remember most of my a-level maths, but don't remember covering this in college Thanks.

2. ### amyclare

that is not any other recognised shape? As in, a rather random mix of straight and curved sides. Is it just an irregular polygon or is there another term?

I'm doing shape with Yr 1 next week and want to get it right. I can remember most of my a-level maths, but don't remember covering this in college Thanks.

3. ### bombaysapphireStar commenter

A polygon has to have straight sides so it wouldn't be one of those.
Once all the sides are straight then you fall into irregular pentagon, hexagon, etc
If they aren't then I would just call it a shape.

4. ### DMNew commenter

Hmmm Reuleaux polygons have curved sides.

But follow bombay's advice and just call it a shape.

5. ### Myttin_da

I would have thought "not all shapes have names..... we have names for special kinds of shapes" would be enough explanation for Year 1

6. ### strawbsEstablished commenter

Gorthugher da! to you myttin_da!
I agree that it would be fine to use the "only special shapes have names" definition

7. ### mmmmmathsNew commenter

Does that mean "I like a good fry up too"!

8. ### PiranhaStar commenter

If you are to do anything with it rather than just describe it, you probably need to divide it up into shapes you can do calculations with.

9. ### DaveGaleAdministrator

I rather agree with the comments before.

You could use more general terms like 'closed' and 'open' shapes or 'concave' and 'convex' where appropriate but I strongly suspect that in year 1 it'd be best to accept that there are so many possible shapes that they couldn't possibly all have different names.

Funny how A level maths doesn't even cover the yr1 syllabus eh? ;-)

Dave

In Year 1?

11. ### PiranhaStar commenter

Eyesight test required - I thought the OP said Year 11!

12. ### ian60New commenter

Hmm, according to Google, you have just said Good morning! to you Good evening!
... in Cornish

It's ok, you don't have to explain why...

13. ### strawbsEstablished commenter

otherway round, but yep! just welcoming myttin_da