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Find DB.

 Jun 10, 2023
 #1
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BD = sqrt(2).

 Jun 10, 2023
 #2
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Angle BDC=180 - (45 + 60) = 75 degrees

Angle ADC=180 - (45 + 30) =105 degrees

 

In triangle ADC, using the Law of Cosines:

CD = Sqrt(2)

DB = Sqrt(3)

 Jun 10, 2023

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