Answer:
I don't think u put up a picture
Answer: Perimeter is when u add all around
Example: The perimeter of a square is 4,5,3,7
Add: 4+5+3+7 get 19
The perimeter will be 19
Okay.
620 would be rounded estimate to 600
&
107 would be rounded estimate to 100
Simplify -45/6 to -15/2, and your answer as a decimal will be -7.5.
They are congruent if they are bisected at their midpoint