Trying to print arcs

Hello guys, I am new to 3d printing and to the forum.This is my first post , so sorry for any stupid questions or already answered ones.So, I have tried to print this model but while it was building the arc , i got lots of “loose” strings as you can see in the photo and discontinuity. Are there any settings that I should check especially for this kind of shapes on my slicer program ?Any help would be appreciated

I use orca slicer, and real filament pla , the temperatures that i use are the ones recommended on the box for the filament which is 50 bed and 210 nozzle .So far i hava tried taking the speed down to 50% from 100% but it didnt really help.