Answer:
A. 110°
Explanation:
according to the theorems,
m∠1=m∠6=m∠9=m∠14=110°;
m∠2=m∠5=m∠10=m∠13=70°;
m∠3=m∠8=m∠11=m∠16=70°;
m∠4=m∠7=m∠12=m∠15=110°.
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