O-LevelMathematicsGeometry4024/12 · May/June 2022 · Q203 Marks
[Figure of a circle with center O, points A, B, C, D on circumference. Angle DOC = 70°, Angle OAD = 25°]
- (a)Find ADB.[1]
- (b)Find BCD.[2]
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Mark scheme
Marking points from the official mark scheme (May/June 2022). The mark or mark type is shown in brackets.
- [1] (a) 35
- [2] (b) 100 B1 for ∠OAB = 55 or ∠OBA = 55
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