A

2010012801

Level: 
A
A triangle is inscribed in a circle. Its vertices divide the circle into three arcs whose lengths are in the ratio \( 3:4:5 \). Determine the measures of the interior angles of the triangle.
\( 45^{\circ},\ 60^{\circ},\ 75^{\circ} \)
\( 20^{\circ},\ 60^{\circ},\ 100^{\circ} \)
\( 20^{\circ},\ 40^{\circ},\ 120^{\circ} \)
\( 50^{\circ},\ 60^{\circ},\ 70^{\circ} \)