Answer:

Step-by-step explanation:
Remember that 
Then,

But
and 
Then

Answer:
line
Step-by-step explanation:
you can obviously see lines in the shape
Answer:
Circle with center (8,2), radius=3
Step-by-step explanation:
x=8
y=2
r=3
Ok so I know the answere it is -11
Answer:
80
Step-by-step explanation: