0 Comments
Answer:
60°.
Explanation:
1. DB is diametre, then
2. m∠BCD=90°, then
3. m∠BDC=m∠BCD-m∠CBD=90-60=30°, then
4. finally, Arc(CB)=2*m∠BDC=60°.
9.4m questions
12.2m answers