問題詳情
4. 如圖，直角△ABC中，∠B＝90°、∠A＝60°，G點為其重心，若
＝6，則BG＝ (4) 。△ABC的內切圓半徑為 (5) 。
參考答案
答案：D
難度：簡單0.701357
統計：A(12),B(29),C(18),D(155),E(0)
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