Who knows how to do the Triangle Inequality Theorem? Please Help me

Question

Who knows how to do the Triangle Inequality Theorem?   Please Help me

anonymous · Answer

http://www.mathopenref.com/triangleinequality.html

anonymous · Answer

http://www.mathwarehouse.com/triangle-calculator/triangle-inequality-theorem.php

anonymous · Answer

those may help

anonymous · Answer

but other then that what s it that you need help with

anonymous · Answer

like this 
A triangle has sides measuring 8 inches and 12 inches. If x represents the length in inches of the third side, which inequality gives the range of possible values for x?
  		A. 	4 ≤ x ≤ 20
  		B. 	8 < x < 12
  		C. 	8 ≤ x ≤ 12
  		D. 	4 < x < 20

anonymous · Answer

ok this will really help http://www.mathcelebrity.com/trinq.php?side1=+8&side2=+12&side3=+&pl=Calculate

anonymous · Answer

it explains as well

anonymous · Answer

so its D

anonymous · Answer

A   $$4 \le x \le 20$$
B

anonymous · Answer

http://www.algebra.com/algebra/homework/Triangles.faq.question.469180.html

anonymous · Answer

ive given you multiple sources if you need anymore help ill be here