ဗဟိုကိုဖြတ်၍အဝန်းပေါ်ရှိအမှတ်နှစ်ခုကိုဆက်ထားသောမျဉ်းကိုအချင်းမျဉ်း ဟုခေါ်သည်။
The line which joints two points on the circumference cross the center is called diameter.
ၿပိဳင္မ်ဥ္းႏွစ္ေၾကာင္းႏွင့္ျဖတ္မ်ဥ္း တေၾကာင္းတြင္ ျဖတ္မ်ဥ္း၏ တဖက္တခ်က္ရွိ နီးစပ်ေထာင့် မဟုတ္သည့္ျပိဳင္မ်ဥ္းမ်ား အတွင်းရှိေထာင့်များ ကို ၀ိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိသမသသိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိိ...
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