これの（2）の解き方で、途中に∠DBC＝∠AEDとでてくるのですがそれがどうしてかわかりません！教えてください！右の写真が答えです！

[2]△ABCにおいて, AB=8, CA = 10, ∠BAC=30° とする. 辺AB上の点をDとしAD=α,辺 AC上の点をEとしAE=bとする.また, 点 B, C, D, E が同一円周上にあるとする.ただし, a,bは正の定数とする. (1) △ABCの面積はカキである. ク (2)αをbを用いて表すと α= ケ -bである. セ ・である. コサ (3) ADBCの面積と △ABCの面積の比が25のとき, a= b= シ ソタ

なぜcouldにはならないのですか？

32 you mind turning the volume down? 1 Can bad 2 Could 191193 Will (4) 4 Would 01

並び順がよく分かりません。どなたかよろしくお願いします。

We ( ( )( )( ) ( ) ( ) ( )()( ) our plan. 1 possible (4) to (2 out (5) did ③ everything (6) carry

高2R 適当ではない英文を1つ選ぶ問題 解説お願いしたいです

Music has the power to influence our emotions and mood. Listening to upbeat songs can make us feel more energetic and happy. On the other hand, many people use quiet music to help them staying focused. + Some studies suggest that learning an instrument can even boost brain power. It is truly a universal language that connects people everywhere.

写真2枚目はどこが違いますか？教えてください。

VII 酢酸 7.2gを水に溶かして1Lとした水溶液のpHは 2.84 である。 この水溶液の水素イオン濃度 と電離度を求めなさい。

以下の写真の様な問題の解き方を教えてほしいです。 問題を貼っていますが、一問ごとの解説ではなく 全体的な分け方について教えてほしいです。 お願いします。

1. I am planning (to travel / traveling) to Europe next month. 2. She is very good at tennis, so you should avoid (to play / playing) against her. 3. We managed (to catch / catching) the last train just in time. 4. I really don't mind (to wait waiting) for another thirty minutes. 5. He promised (to call / calling) me as soon as he arrived at the airport. 6. The company decided (to close / closing) its Tokyo office. 7. You should practice (to speak / speaking) English every day. 8. They offered (to help / helping) us clean up the kitchen. 9. I can't imagine (to live / living) without my smartphone. 10. He refused (to sign signing) the contract until he read it carefully. 11. She gave up (to look / looking) for her lost earring. 12. I expect (to finish / finishing) this project by Friday. 13. We ended up (to stay / staying) at a cheap hotel because of the storm. 14. They put off (to have / having) the meeting until next week. 15. He pretended (to know 16. The thief denied (to steal / stealing) the expensive watch. 17. I cannot afford (to buy buying) a new computer right now. 18. Have you finished (to wash / washing) the dishes yet? 19. She hesitates (to tell / telling) the truth to her parents. knowing) everything about the issue. 20. I enjoy (to listen / listening) to podcasts while commuting. 21. My brother suggested (to go / going) to the beach this weekend. 22. We hope (to see / seeing) you again in the near future. 23. You must keep (to try / trying) until you succeed. 24. The doctor recommended (to take / taking) a few days off. 25. He failed (to pass / passing) the driving test for the third time. 26. She dislikes (to wake waking) up early on Sundays. 27. They are preparing (to move / moving) to a new apartment. 28. I miss (to hang / hanging) out with my friends from high school. 29. He demanded (to speak / speaking) to the manager immediately. 30. Please escape (to make / making) careless mistakes on the exam.

動詞は助動詞と本動詞のどちらかに分けることができますか？助動詞だけの文、本動詞だけの文ってありますか。進行形や完了形の文とかはどう考えたらいいのですか？基本的なことですみませんが、いまいちよくわかりません。どなたか教えていただけるとありがたいです。

並べ替える問題を教えてください🙇‍♀️

We had (1. cut □. down. how =. idea .no . to) on our expenses because we were so used to living in luxury.

英語リードAです。主格、所有格、目的格それぞれ見分け方が分からないです。

4 〈関係代名詞> 次の2文を関係代名詞を使って1文にしなさい。 (1) I have a cousin. He can ski very well. I have a cousin ovil od basebne na oved (9) (2) This is the card. He sent it to me last week. 3oob o This is the card V (3) Brian bought a book. Its cover was black. Brian bought a book (4) The building is a museum. It stands by the lake. 110 dair is a museum. (5) We like the student. Our teacher introduced him to us.da We like the student (6) Look at the lady and her dog. They are running over there. Look at the lady and her dogjai m loodba odt at ardT (1)

（1）〜（3）のノートの反応式が答えと同じかどうか確認してほしいです！ （4）、（5）は反応式の書き方が分かりません💦教えてください🙇‍♂️

アラニンが次の物質と反応するときの化学反応式を記せ。 (3) エタノール (4)無水酢酸 365 アミノ酸の反応 (2) 水酸化ナトリウム水溶液 (1)塩酸 (5) アラニン (同じ物質量で反応)