Answer:
10
Step-by-step explanation:
An acute angle is infact 90 degrees, therefore your answer is correct.
Answer:

Step-by-step explanation:


Volume of rectangular prism = l*w*h

8 and 1
8 squared is 64 and 1 squared is 1
64 + 1 = 65
Hope this helps :)
Yes, if FJ || GH, and also if FG || HJ, since a parallelogram has two pairs of parallel sides.
now, we know FG = HJ = 10, but if it's a parallelogram, then the other two sides must also have the same length, so chances are FJ = GH = 15.