Answer:
m<DEB = 62°
Explanation:
From the figure we can see a circle with center O.
To find the measure of <DOB
From the figure we get,
m<DOC = 44° and m<COB = 80°
We know that, m<DEB = m<DOB/2
m<DOB = m<DOC +m<COB
= 44 + 80
= 124
To find the measure of <DEB
m<DOB = 124
Therefore m<DEB = m<DOB/2
= 124/2 = 62°