isischi isischi

02-06-2020
Mathematics

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please help! i’m stuck

please help im stuck class=

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PollyP52 PollyP52

02-06-2020

Answer:

CD = 12.

Step-by-step explanation:

By the tangent-secant theorem:

AB^2 = AC * AD

8^2 = 4 * AD

AD = 64/4 = 16

Finally CD = AD - 4 = 12.

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