解答

AB = 10,D(7, 0) = CO = 半徑

OD = √(7^2 - 5^2) = √24 = 2√6
=> 圓心 (7, 2√6)

Ny-Ålesund

AB = 24 => AC = BC = 12

AB ⊥ O1O2

O1C = √(20^2 - 12^2) = 16
O2C = √(13^2 - 12^2) = 5
=> O1O2 = 16 + 5 = 21

once tzuyu 💘

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