On a circle, fifteen points A_1,A_2,A_3,\dots,A_{15} are equally spaced. What is the size of angle A_1A_3A_7?
Answer Choices
A. 96^\circ
B. 100^\circ
C. 104^\circ
D. 108^\circ
E. 120^\circ
On a circle, fifteen points A_1,A_2,A_3,\dots,A_{15} are equally spaced. What is the size of angle A_1A_3A_7?
Answer Choices
A. 96^\circ
B. 100^\circ
C. 104^\circ
D. 108^\circ
E. 120^\circ