Question

Question 8 of 11

A triangle has two sides of length 10 and 10. What value could the length of
the third side be? Check all that apply.
A. 5
B. 3
O C. 11
O D. 19
E. 21
O F. 25

Answer 1

By definition a triangle's third side must be larger than the difference of the other two sides (so in this case 10-10 = 0, so it must be larger than 0) and smaller than the sum (so 10+10 = 20 so it must be smaller than 20). Because this is not a specific type of triangle such as a right triangle, this is really the only rule that applies in this problem, so everything except E and F apply.