Question

Which of the following sets of numbers could be the lengths of the sides of a triangle?

A. 8 m, 8 m, 17 m

B. 8m, 4 m, 2 m

C. 8 m, 16 m, 24 m

D. 8 m, 6 m, 4 m

Answer 1

for every triangle with sides A,B and C there are three conditions
A+B>C
A+C>B
B+C>A

Answer 2

then D is right
why?

Answer 3

thanks!