Mathematics
Junior High
Solved
答えは20°です。解説お願いします
(1) 右の図のように, △ABCの辺 AC上に
点Dがある。 AD = DB= BC.
C
LABC= 150°のとき,
D
ZACBの大きさを求めなさい。
150°
%2+
A
B
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