Mathematics · Geometry
In a circle with centre O, AE is a diameter and C is a point on the circle such that ∠AOC = 100°. If D is a point on the circle such that CDE is a cyclic quadrangle property, find the value of ∠CDE + ∠CEA.
- 180°
- 290°✓
- 3100°
- 460°
Correct answer
90°
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