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Vesnalui [34]
3 years ago
5

Please help. Will give brainliest.

Mathematics
1 answer:
Anastaziya [24]3 years ago
8 0

Answer:

7.

radius [r]=3in

length of bold part of circle=(360-40°)/360×2πr

=8/9×2×π×3=16.755

8.

we have

x²-2=2-y²

x²+y²=4..........(1)

comparing above equation with

(x-h)²+(y-k)²=r²

we get

centre(h,k}=(0,0)

radius [r]=2 units

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