- A115°
- B65°
- C130°
- D100°
Step-by-Step Solution
Triangle CBD is isosceles (CB = CD), so ∠CDB = 25° and ∠C = 180° − 25° − 25° = 130°. (Likewise ∠A = 100°, ∠B = ∠D = 65°; total 360°.)
Answer: C) 130°
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