Math Is Fun Forum

jacks

Member

Registered: 2012-11-21

Posts: 132

Total no. of Triangle,Square and Rectangle

[1] Calculation of Total no. of Triangles form joining any 3  points in a Given Figure.

[2] Calculation of Total no. of Square form joining any 4 points in a Given Figure.

[2] Calculation of Total no. of Rectangle form joining any 4 points in a Given Figure.

Bob

Administrator

Registered: 2010-06-20

Posts: 10,643

Re: Total no. of Triangle,Square and Rectangle

hi jacks,

I suggest you start with squares; that looks easiest to me.

You can have squares that are 1 by 1; 2 by 2; 3 by 3; and 4 by 4.

EDIT:  You should also count the squares that are at 45 degrees to the grid.

There's an easy pattern to this, so finding that is a good beginning to the harder rectangle case.

Bob

Last edited by Bob (2013-09-29 09:13:07)

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bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Total no. of Triangle,Square and Rectangle

Hi;

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.