Answer:
15 degreese
Step-by-step explanation:
Given AOB 30 - has to make angle DOB 150 cause that be 180 since DA is the diameter
Also they say DE is the same as EK - 30
now EKA is 180 but you got to subtract that EK 30 = 150
to find C you do 1/2 ( ABD - KA )
1/2 (180 - 150)
is 15
