Mathematics
Senior High
２つの交わる円がある場合、中心を結ぶ線と２つの円の交点を結ぶ線は必ず90度になるものなのですか？？
ムへABD で正弦定理より,
AD7v9A600 oc ロ
20Aニ<呈ABD 275
5
-OO' と AB の交点をE・
COS ZCBE三cos A
こ=Y『
5
であり, ZCEB=90” よ
cos CB =と
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