Check the picture below.

since the distance AB cannot be a negative value, thus is not -3-√(130).
This is simple :)
If 9 chairs can fit in one box, and you have 3,456 chairs, just divide how many chairs you have by how many can fit in the box in order to find how many boxes you will need.
3,456/9 = 384
384 boxes will be needed
The SAS or side angle side proves the triangle is congruent to each other
Answer:
2400 slabs. If this helps, please give brainliest!