first one is closed because there is no way or line that is opened second one is not simple cause it is curved and its a little Complex third one is not simple close because it does not contains any lines it is really curved 4th one is simple closed because it is made of 4 lines and it is closed last one is not simple closed because it is made up of many lines
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first one is closed because there is no way or line that is opened second one is not simple cause it is curved and its a little Complex third one is not simple close because it does not contains any lines it is really curved 4th one is simple closed because it is made of 4 lines and it is closed last one is not simple closed because it is made up of many lines