Need math help with a triangle that has 2 sides that have lengths of 8cm and 14 cm

Mathematics
Tutor: None Selected Time limit: 1 Day

which length could NOT represent the length of the third side

15 cm

7 cm

22 cm

18 cm

Nov 11th, 2015

Thank you for the opportunity to help you with your question!

a=8cm b=14 cm

the third side must be bigger than the difference 

c> b - a 

c> 14 cm - 8 cm

c > 6 cm

and  

the third side must be 

smaller than the sum

c < b + a

c < 14 cm + 8 cm

c< 22 cm

therefore answer is:

22 cm

Please let me know if you need any clarification. I'm always happy to answer your questions.
Nov 11th, 2015

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