Quick question about inertial frames of reference

[aeromat]

Homework Statement

If you are on the merry-go-round going in a circle at constant speed, are you looking at the world in an inertial, or non-inertial frame of reference?

How do we tell whether from one's viewpoint, they are looking at something from an interial or non-inertial frame of reference?

 

[Dick]

Didn't they define 'inertia frame'? Simply put, an inertial frame of reference is one that's not accelerating. If you are going in a circle on a merry go round, are you accelerating?