If two sides of a triangle have lengths 4 and 7, which of the following could be the perimeter of the triangle?
I. 9
II. 15
III. 19  Choose the correct choice from the following answers.
A) None B) I only C) II only D) II and III only E) I, II, and III
Let x be the length of the third side.   7-4 &lt; x &lt; 7+4   3 &lt; x &lt; 11   14 &lt; perimeter &lt; 22   The answer is II and III only.
<result>D</result>
If two sides of a triangle have lengths 4 and 7, which of the following could be the perimeter of the triangle?
I. 9
II. 15
III. 19