2019
Mathematics
JAMB
In the diagram above, O is the centre of the circle ABC, < ABO = 26° and < BOC = 130°. Calculate < AOC.
A.
26°
B.
13°
C.
80°
D.
102°
Correct Answer: 102°
Explanation
< BAC = 130/2 (angle subtended at the centre) < BAC = 65° Also, x = 26° (theorem) y = 65° - 26° = 39° < AOC = 180° - (39° + 39°) = 102°
< BAC = 130/2 (angle subtended at the centre) < BAC = 65° Also, x = 26° (theorem) y = 65° - 26° = 39° < AOC = 180° - (39° + 39°) = 102°THIS WEEK's
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