Question on: WAEC Mathematics - 1995
In the diagram above; O is the centre of the circle and |BD| = |DC|. If ∠DCB = 35°, find ∠BAO.
A
20o
B
25o
C
30o
D
35o
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Correct Option: A
< DBC = 35° (base angles of an isosceles triangle)
< CDB = 180° - (35° + 35°)
= 110°
< ADB = 70°; < ADB = 90°
\(\therefore\) < BAO = 180° - (70° + 90°)
= 20°
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