The equation for the area of a circle is:

. Insert 9 as your radius (r) into the equation and solve:
\pi 9^2 = 254.469
Cos(t/2) I got .45 is that what you were looking for or do I need to plug it into the equation up top? can you give me notes of something? cos( -9/11/2) = .45
Answer:
What do think the answer is cause I don't know
Answer:
I THINK 20 mm
Step-by-step explanation:
Answer:parallel
Step-by-step explanation:
they will be parallel because they are equal