Answer:
they needed an acurate calender to tell the date
Explanation:
Answer: 8
If EF is a line perpendicular to AB, then it forms four (90 degrees) angles intersecting AB. If AB is parallel to CD, and EF also intersects CD, then it form another four (90 degrees angles again. Total 90 degrees angles formed is 8.
It can make houses collapse
damage such as inside things can break ect
environmentally the tornado will cause a lot of damage
I think it can cause floods!!