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• 如下圖(六),四邊形 DBCF是圓內接四邊形若∠A=44°,∠E=36°,則∠C=? (A)50°(B)52° (C)54° (D)56°
• 如下圖(五), 分別切圓0於A、B,且C點在圓O上。若6∠ACB-7∠P,則∠ACB=? (A)61° (B)62° (C)63° (D)64°
• 如下圖(四),兩弦 的延長線相交於圓外一點P,且∠APC=47°。若 =? (A)162° (B)164° (C)166° (D) 168°
• 如下圖(三),圓O1和圓O2外切, 是圓O1和圓O2的外公切線，且A、B是切點,又 相交於P點若圓O1和圓O2的半徑分別為12和18,則 =? (A) 88 (B) 90 (C)92 (D)94
• 如下圖(二)，圓O是△ABC的內切圓，且D、E、F分別是切點。若 =? (A)11(B)5(C)12 (D)5
• 如下圖(一),圓O1和圓O2外切於C, 都是圓O1和圓O2的公切線。若∠DO1O2=54°,則∠DO2O1=? (A)32°(B)34° (C)36° (D)38°
• 若圓O是四邊形ABCD的外接圓且3∠A=2∠C則∠C-∠A=?(A) 24° (B)28° (C) 32° (D)36°
• 已知圓0的半徑為18公分,若A和B兩點在圓O上,且 的長度為 公分,則∠AOB=?(A) 44°(B)48°  (C) 52°(D) 56°
• 已知四邊形ABCD是圓內接四邊形。若∠BAC=34°,則∠BDC=?(A) 32° (B)34° (C)36° (D)38°
• 已知圓O1和圓O2的半徑分別為6和4。若 ,則圓O1和圓O2的位置關係為何?(A)內切(B)外切 (C)內離(D)外離

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