dinafunaro dinafunaro
  • 08-12-2020
  • Mathematics
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please answer giving brainliest

please answer giving brainliest class=

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serenavass
serenavass serenavass
  • 08-12-2020

Answer:

12

Step-by-step explanation:

it is given that CD is tangent to O B

so BDC is right triangle.

pythagorean theorem

BD^2=BC^2+CD^2

13^2=5^2+CD^2

169-25=CD^2

CD=√144

CD=12

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