Its different for different aircraft and its usually placarded beside the lever. i see a few references to 172s there. That depends on the model. The 172P can take 10 degrees at 110kts, the rest in the white arc. The piper archer by comparison you arent permitted to put any flap down until in the white arc. The 210 is model dependent too. In my L model i can take 10 degrees at 140kts, and throw the wheels out then too, but no more flap til the white arc, but in later models such as the M and N, you can throw out 10 flap and wheels at 165, at the top of the green arc.
So there is no hard and fast answer for all a/c types. As someone says, read the Flight Manual, its all in there. Most likely in the most illogical place in the flight manual imaginable if its a cessna one
