Mathematics
Junior High
Resolved
3分の5△BEFっていう考え方が分かりません。詳しく教えて欲しいです!
2
(2) 右の図のように、DとE
を結ぶ。
A
⑤
D
[5]
BF:FD=3: 5 だから,
F
[3]
acm2
ADEF=ABEF30305
3
B3E2 C
OA
025
3°
=a (cm²)
-6-2
80: 5=38
4
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