If you have a triangle that has two sides that the lengths are 8 and 10 what is the length of the third side? click all that apply

Question

A.18

B.20

C.10

D.7

E.4

F.8

Answer 1

3rd side a triangle has to be less than sum of the other 2 sides T<10+18. T<18

that eliminates A and B, 20 and 18.

the difference of two sides has to be less than the 3rd side

10-8=2 < 10,8,7 or 4

that leaves

C,D,E, and F

Actually A is sort of a "degenerate" triangle, as it collapses into a straight line, which is not really considered a real "triangle" if two sides are 10 and 8, with the 3rd side = 18, it's a straight line, a sort of "triangle" with angles 180 and 0 and 0 degrees.