Answer:
Do you mean 54x2=6?
Step-by-step explanation:
???
Answer:

Step-by-step explanation:
we know that
-----> by central angle
see the attached figure to better understand the problem
we have


substitute


Answer:
A. add 81; 
Step-by-step explanation:
The perfect square formula

Rewrite expression
as follows:

So, to form a perfect square,
is missed.
When we add
we will get

Answer:
63 mils
Step-by-step explanation: