Uniform Circular motion Tetherball? Find theta?!

A 0.020-kg mass is attached to a 1.2-m string and moves in a horizontal circle with a constant speed of 1.50 m/s, as shown in the figure. What is the measure of angle ??

The picture is just of a tetherball pole and string with a ball attached

Ugh I don't understand how you are supposed to find this if you aren't given the radius?

The second part of the question I run into the same problem with not really knowing how to start it because it seems like Im missing crucial info!

A 0.020-kg mass is attached to a 1.2-m string and moves in a horizontal circle with a constant speed, as shown in the figure. The tension in the string is measured at 0.200 N. What is the measure of angle ??