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irina [24]
2 years ago
8

Easy points..........

Mathematics
1 answer:
IRINA_888 [86]2 years ago
5 0

Answer:

  • 38°; 142°; 308°

Step-by-step explanation:

The solution of each question is self-explanatory.

<u>Used properties</u>

  • Vertical angles are congruent
  • Angle sum property of circle
  • Central angle is same as intercepted arc measure
<h3>#8</h3>
  • mED = mAB = mAC - mBC = 90° - 52° = 38°
<h3>#9</h3>
  • mEA = mBCD = mBC + mCD = 52° + 90° = 142°
<h3>#10</h3>
  • mBDC = 360° - mBC = 360° - 52° = 308°
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