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amid [387]
2 years ago
8

Anyone know how to answer this question

Mathematics
1 answer:
Marina86 [1]2 years ago
4 0

Answer:

x²+y²=225

Step-by-step explanation:

when centered at the origin the equation of a circle is x²+y²=r²

we are given x and y so 9²+12²=r²

r^{2} =9^{2} +12^{2}\\ =81+144\\ =225

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