chelseam67 chelseam67

05-06-2019
Mathematics

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In circle D, the radius DA is 9 mm and the tangent line AB = 12 mm.
Find DB

In circle D the radius DA is 9 mm and the tangent line AB 12 mm Find DB class=

Respuesta :

05-06-2019

Answer:

DB is 15 mm

Step-by-step explanation:

Due to pythagoras theorem

[tex]db ^{2} = da ^{2} + ab ^{2} [/tex]

[tex]db {}^{2} = 9 {}^{2} + 12 {}^{2} [/tex]

[tex]db = \sqrt{225} [/tex]

db=15

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