Question

answer is 76,39,58.... need the formula with explanation. fast plz​

Answer 1

Answer:

hope my answer in the above attachment helps you

Answer 2

Step-by-step explanation:

DBC + BCD = BDA (Exterior angle property)

DBC = BDA - BCD

DBC = 104° - 65°

$\large\boxed{DBC= 39°}$

Let DBA = x

BAD = 3 × DBA

BAD = 3x

$x+3x+104°=180°$ (Angle sum property)

$4x=180-104°$

$x=\Large\frac{76}{4}$

$x=19°$

BAD = 3x = 3(19) = 57°

DBA = x = 19°

ABC = DBA + DBC

ABC = 19° + 39°

$\large\boxed{ABC = 58°}$

CDB + DBC + DCB = 180° (Angle sum property)

CDB + 39° + 65° = 180°

CDB = 180° - 104°

$\large\boxed{CDB=76°}$

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