Find triangle side lengths

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goldenstar
Posts: 73
Joined: Sun Jan 20, 2013 11:22 am

Find triangle side lengths

Post by goldenstar »

What is answer for this. Thanks for help.

Nina has some sticks of different lengths.
She can lay the sticks end to end to make
triangles, like this:


Nina chooses sticks with lengths
2cm; 3cm; 5cm; 6cm; 8cm;
Which of these sets of three sticks can Nina
use to make a triangle?
A 2cm, 3cm, 5cm
B 2cm, 3cm. 6cm
c 2cm, 3cm, 8cm
D 3cm,5cm,6cm
E 3cm, 5cm, 8cm
hermanmunster
Posts: 12820
Joined: Fri Sep 15, 2006 9:51 am
Location: The Seaside

Re: Find triangle side lengths

Post by hermanmunster »

what sort of triangle are you trying to make?
Guest55
Posts: 16254
Joined: Mon Feb 12, 2007 2:21 pm

Re: Find triangle side lengths

Post by Guest55 »

Try drawing them and thinking whther they COULD make a triangle.

For example no-one can make a triangle with sticks 5cm, 10cm and 17cm because .... think about it!
goldenstar
Posts: 73
Joined: Sun Jan 20, 2013 11:22 am

Re: Find triangle side lengths

Post by goldenstar »

https://www.dropbox.com/s/mwbe6lr9zgvil ... 5%2022.jpg" onclick="window.open(this.href);return false;

Image

Please find above
Guest55
Posts: 16254
Joined: Mon Feb 12, 2007 2:21 pm

Re: Find triangle side lengths

Post by Guest55 »

I know the answer but you need to think about how you know that some of these options just won't work!
Okanagan
Posts: 1706
Joined: Mon Aug 22, 2011 9:20 pm
Location: Warwickshire

Re: Find triangle side lengths

Post by Okanagan »

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