Respuesta :

m<DHG=(m arc DB)/2     Equation (1)

m<DHG=55°

Replacing in the equation (1)
55°=(m arc DB)/2

Solving for the unknown. Multiplying both sides of the equation by 2:
2(55°)=2(m arc DB)/2
110°= m arc DB
m arc DB=110°

Answer: The measure of DG is 110°