- A105°
- B75°
- C110°
- D95°
Step-by-Step Solution
∠ADC = 35° + 40° = 75°. Opposite angles of a cyclic quadrilateral are supplementary, so ∠ABC = .
Answer: A) 105°
A, B, C and D lie on a circle and the diagonals AC and BD of quadrilateral ABCD meet at E. If ∠ADB = 35° and ∠BDC = 40°, find ∠ABC.
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