Determine which of the following cannot be a triangle.
A. 3cm, 8cm, 12cm
B. 7cm, 8cm, 14cm
C. 10cm, 12cm, 21cm
D. 6cm, 10cm, 15cm

Question

Determine which of the following cannot be a triangle.
A. 3cm, 8cm, 12cm
B. 7cm, 8cm, 14cm
C. 10cm, 12cm, 21cm
D. 6cm, 10cm, 15cm

unklerhaukus · Answer

the sum of the smaller sides must at least the length of the greatest side

anonymous · Answer

the sum of any two sides must be greater than the third...

anonymous · Answer

so, option A

anonymous · Answer

use Pythagoras Theorm

hero · Answer

c'mon @Arnab09 , give the person time to try to figure out what the answer is before blurting it out. Giving the answer is not very helpful.

anonymous · Answer

another thing to check, modulus difference of 2 sides must be less than the third side

anonymous · Answer

ok, @Hero

anonymous · Answer

anonymous · Answer

@Jasminebunnies  go through the link!