✨ Best Answer ✨
接弦定理を使う
これより、∠BAT=∠BCA=50°
そうすれば ∠OCA=20°がでる
△OCAはOC=OAの二等辺三角形だから
180°-20°×2=140°が求まります
Answers
Were you able to resolve your confusion?
Users viewing this question
are also looking at these questions 😉
✨ Best Answer ✨
接弦定理を使う
これより、∠BAT=∠BCA=50°
そうすれば ∠OCA=20°がでる
△OCAはOC=OAの二等辺三角形だから
180°-20°×2=140°が求まります
Users viewing this question
are also looking at these questions 😉
わかりました！ありがとうございます！