Mathematics
Junior High
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各位大佬,請教教我,拜託
(D) 甲錯誤,乙正確
15. 如右圖,平行四邊形 ABCD中,ACCD,∠ADC = 60°,
AB = 12,其中 G、G, 分別為△ABC與△ACD 的重心,
則 GG, 的長度為何?
(A) 3-√√5
(B) 3/7
(C) 4√5
(D) 4√7
數學 9-6
B
G₁
rip
C
D
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