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borishaifa [10]
3 years ago
10

How do you work out question B

Mathematics
1 answer:
hammer [34]3 years ago
5 0
Angle ODC=20°
Angle OCD=90° because line OC is the radius and when the radius meets a tangent, it is always 90°.
Angle COD=180-90-20
Angle COD=70°
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