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White raven [17]
3 years ago
13

How do I work out this problem? I’m not sure which circle theorems would apply etc.

Mathematics
1 answer:
Westkost [7]3 years ago
8 0
Angle BCA =30 (angle in the same segment)
x=180-90-30=60
angle DBA =72/2 =36 (angle at centre twice angle at circumference)
y=36 (angles in alt segment)
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