HollyShip
HollyShip HollyShip
  • 09-05-2018
  • Mathematics
contestada

help me please urgent

help me please urgent class=

Respuesta :

choixongdong
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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