Mathematics
Junior High
全体的に分かりません😥
詳しく説明をお願いします🙇♀️
18
B
E
A 3 D
G
X-----
-11-
F
線分ACをひき,
EF との交点をGとすると､
EF // BC より,
C
AG: GC= AE: EB=1:1
△ABC で, 中点連結定理より,
EG = 1/23BC=1/2
ACDAで,中点連結定理より, GF = 1/12 AD=12/27
よって、x=112+2/3=7
秋田
x=
7
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