HollyShip
HollyShip
09-05-2018
Mathematics
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help me please urgent
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choixongdong
choixongdong
09-05-2018
BA is tangent to circle O to BA perpendicular to OA
given :BA = 15, OB = 17
a^2 = c^2 - b^2
a^2 = 17^2 - 15^2
a^2 = 289 - 225
a^2 = 64
a = 8
OA = OC = 8
answer
radius of circle O = 8
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