Mathematics
Junior High
理由は根拠持って教えてほしいです!!
次の図で, 4点 A, B, C, Dが1つの円周上にあるのはどれですか。
①
110°D
D
A
A
D
~45°
A
30°
80°
40°-
<60° 40°
B
C
・B
B.
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