The geometry illustrates that the value of DB is 34°
How to calculate the angles?
AB = 87°
ED = 37°
BCD will be:
= (360° - 87° - 32°)/2
= 118°
FA will be:
= 118°/2
= 59°
DC = 118/2 = 59°
HB = GA = 17°
DB = 2 × 17° = 34°
EG = GA = 17°
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