A triangle has the following measurements. What is a possible length for the third side?

AB = 5, BC = 7, CA = ? (2 points)
2
5
12
13

Question

A triangle has the following measurements. What is a possible length for the third side? 

AB = 5, BC = 7, CA = ?  (2 points)
2
5
12
13

anonymous · Answer

Are you given the perimeter? If so, add up the known variables and subtract the total from the perimeter and you'll get the other length.

noelgreco · Answer

The third side has to be at least a certain minimal length, but not longer than a certain maximum.  Drawing the two given sides will make that clear.

You can't make a triangle out of sides of just any lengths.

anonymous · Answer

Triangle inequality Theorem: the sum of any two lengths of any sides of a triangle is regather that the third side so if 5+ 7= 12 i know it wont be 12 or 13 so it can either be 2 or 5 right?

cwrw238 · Answer

it can be 5

anonymous · Answer

okay could it be 2 as well?

cwrw238 · Answer

no 7 = 5+2  - thats a straight line

noelgreco · Answer

No, at 2 the 5 and 2 sides would just lie flat along the 7 side.

anonymous · Answer

thank you

cwrw238 · Answer

i'm trying to remember the correct criteria - i messed it up just now..

anonymous · Answer

what did you mess up?

cwrw238 · Answer

didn't you see my posts before i deleted them ??   lol

anonymous · Answer

lol its okay