Mathematics
Junior High
[円周角の定理]解説お願いします
(3)
C
29°
B
0
34°
IC
D
A
(直線ADは円Oの接線)
(3) ZAOD=90°-34° 56°
ZAOB=56°+2×29°=114°
ZOAB=(180°-114°)÷2=33°
Zx=90°-33°=57°
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