1103021509

SubArea: 
Circles
Level: 
A
Project ID: 
1103021509
Source Problem: 
2010012807
Accepted: 
1
Clonable: 
1
Easy: 
1
A regular dodecagon \( ABCDEFGHIJKL \) is inscribed in a circle. Find the measures of all interior angles of the quadrilateral \( ABHJ \). (See the picture.)
\( \alpha=120^{\circ},\ \beta=75^{\circ},\ \gamma=60^{\circ},\ \delta=105^{\circ} \)
\( \alpha=105^{\circ},\ \beta=60^{\circ},\ \gamma=75^{\circ},\ \delta=120^{\circ} \)
\( \alpha=120^{\circ},\ \beta=30^{\circ},\ \gamma=60^{\circ},\ \delta=105^{\circ} \)
\( \alpha=105^{\circ},\ \beta=75^{\circ},\ \gamma=75^{\circ},\ \delta=105^{\circ} \)