Posted: 8/27/2007 6:11:59 AM EDT
I can't believe I don't know the answer to this.  Identify the set that could be the measures of the sides of a triangle.: 4,7,12 18,9,10 25,15,10 18,8,7 Thanks.
|
I think the answer is: 18,9,10 The rest would essentially end up as straight lines, as the longest line is more (ETA: or equal to) the 2 shorter sides, so they aren't possible. |
Yup, 18, 9, 10 It'll be a very SMALL triangle, but 'tis the only possible selection |
Wouldn't that make it 4, 7, 12 then? 
|
No, 12 > 4 + 7 (can not connect) 18< 9 + 10 (only possible triangle) 25 = 10 + 15 (straight line) 18 > 8 + 7 (can not connect) If you take string, or paper, and cut them to the lengths listed, you will find you can only make a triangle out of 1 of the list numbers, 18,9,10. |
Win a FREE Membership!
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.