Mathematics
Junior High
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48° P. 25 52** 0 B

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✨ Best Answer ✨

線分ABは円Oの直径より、∠ACB=90°
ゆえに、∠ABC=38°
∠ABCと∠APCは弧ACが共通なので、∠ABC=∠APC

したがって、x=38°

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角ACBが90°だから角ABCが求めれます。円周角の定理を用いたらあとは求めれます。

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