Question

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Answer 1

so I do 17^2 times pi?

Answer 2

Pi ( 13.2/2 + 4.4 )^2 - Pi ( 13.2/2)^2

Answer 3

oh okay so 243.3 mm^2 then

Answer 4

That is right I think thanks for clarifying :)

Answer 5

so the form is

Pi R^2 - Pi * r^2 , Big radius R, little radius r

Answer 6

since you have subtract the little circle of radius r from the big circle of radius R

Answer 7

right