In quadrilateral ABCD, we have AB = 3, BC = 6, CD = 4, and DA = 4.
If the length of diagonal AC is an integer, what are all the possible values for AC? Explain your answer in complete sentences.
Draw a picture!
Apply the triangle inequality. There is more than one triangle to think about
The possible values of AC are 3, 4, 5, 6, 7, 8, and 9.