Answer:
9.8 Inch
Step-by-step explanation:
The distance from the upper left corner to the bottom right corner of the box is the longest diagonal of the box.
For a rectangular prism:
Length of the Longest diagonal 
Therefore:
Length of the pencil

It will definitely be a positive
Answer:
Step-by-step explanation:
Correct
Answer:
the answer is option A. Because if it is a parallelogram QR must be parallel to TS and QT must be parallel to RS