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9 . 設△ABC 的周長是 42,面積是 126 平方單位,則其內切圓周長為何?(A) (B) (C) (D) 。
問題詳情
9 . 設△ABC 的周長是 42,面積是 126 平方單位,則其內切圓周長為何?
(A)
(B)
(C)
(D)
。
參考答案
上一篇 :
8. 化簡 (A) (B) (C) (D)
下一篇 :
11.坐標平面上,直線 12x+5y=60 交 x 軸於 A 點,交y 軸於 B 點。若 O 為原點,I 點為△AOB 的內心,則△AIB 的面積=?(A) 13 (B) 12 (C) 15 (D)
資訊推薦
10. 如圖,正六邊形ABCDEF的內心為I,且 =10,則正六邊形的內切圓面積=?(A) 50π(B) 75π(C) 100π(D) 120π
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