Answer:
The length of each side of the base is 
Step-by-step explanation:
we know that
The area of a square is equal to

where
b is the length side of a square
In this problem we have

so
substitute in the formula

Square root both sides


Answer:
EF = 1.5. DF = 2.
Step-by-step explanation:
DE is half of AB so EF is half of BC and DF is half of AC.
Answer:
I think its 6 units
Step-by-step explanation:
The area is 30 units so therefore you would divide it by any side so therefore if you would do 30 divided by 5 you would get 6.