Answer:
Step-by-step explanation:
The solution of each question is self-explanatory.
Used properties
- Vertical angles are congruent
- Angle sum property of circle
- Central angle is same as intercepted arc measure
#8
- mED = mAB = mAC - mBC = 90° - 52° = 38°
#9
- mEA = mBCD = mBC + mCD = 52° + 90° = 142°
#10
- mBDC = 360° - mBC = 360° - 52° = 308°
