Mathematics
Senior High

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答(1)3:4
(2)2:1

FO. 11 全角形の面積と線分の比 右の図で、AD: DB=2:1, AF : FC=3:4のとき, 次の比を求めよ。 (1) AOAB: AOBC (2) △OAC: △OBC 14 D 10 BE F C

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