Mathematics
Junior High
Resolved
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中2 角の大きさの和
(2) ∠a~ ∠gの和は,
A
D
a
E
四角形ABCD の内角
と △EFGの内角の和
の和に等しい。
g
d
e
G
F
h+i
b
h
B
i
C
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