△ABCの内角の和を考えて
2●+2✖
=180°-36°
=144°
よって
●+✖=72°
△PBCの内角の和を考えて
∠BPC
=180°-(●+✖)
=180°-72°
=108°
△ABCの内角の和を考えて
2●+2✖
=180°-36°
=144°
よって
●+✖=72°
△PBCの内角の和を考えて
∠BPC
=180°-(●+✖)
=180°-72°
=108°
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わかりました!ありがとうございます