Mathematics
Senior High
5番と7番を教えて欲しいです！急ぎです！
36- X十72
四角形 EFGHの周囲の長さ x。
点 E, F, G, H
はそれぞれ線分
AB, BC, CD,
DAの中点。
A
H
D
E
G
8
10
c 164
B
F
C
(7)点Gは△ABCの重心
A
3
G
B
X
4:3ズ
5
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