A circle with a radius of 3.9 cm is centered at the vertex of an angle. Suppose the angle has a measure of 175 degrees.

What is the radian measure of this angle?
 radians   

What is the length (in cm) of the arc subtended by the angle's rays along the circle?
 cm   

Suppose θ represents the varying degree measure of the angle. Write an expression that represents the length (in cm) of the arc subtended by the angle's rays along the circle. (Enter "theta" for θ.)
 cm