283番の解説をお願いします

arors alons-y e premiers'appe- Tait Schulz, ensemble. As-tu un enfant? va 2ONCE CENDRILしON Je: Se cople puis long- Iétait une fois un hómme riche dont la femme Le cercueide verre av tci fo un avoir n 61 ISer |de 282. AABC において, 次の問いに答えよ。 (1) aを A, B, cで表せ。 c'sin AsinB 2sin(A+B) となることを示せ。 (2) △ABC の面積をSとするとき, S= No. *283. AB=2, BC=3, CD=1, ZB=60° の四角形 ABCD が円Oに内接していると Date き,次のものを求めよ。 (1) 対角線 AC の長さ (3) 辺DA の長さ (2). 円Oの面積 (4) 四角形 ABCD の面積 26 例題48 半径1の円に内接する正十二角形について, 次のものを求めよ。 周の長さ 発展(1) (2) 面積S 考え方 正十二角形を12個の合同な二等辺三角形に分けて考える。 (1) 円の中心を 0, 正十二角形の隣接する頂点を A, Bとすると, ZAOB=360°-12=30° △OAB において,余弦定理より, AB=12+1°-2·1·1.cos 30° 解 B Q.6 30° 0 268 /3 =1+1-2·1·1·Y =2-V3 2 AB>0 より, O 4-23 V2 V6-(2 4-2/3 AB=/2-/3 2 してこ (3+1)-2/3×1 ミこで 3-1 2 V2 2 よって、周の長さは、16-2x12=6/6 -6/2 -×12=6/6-62 2 したP (2) S=△OAB×12=- …1·1·sin30°×12=3 2721 284.半径rの円に内接する正n角形と外接する正n角形がある。次のものをr, n を用いて表せ。ただし,n23 とする。 (1) 円に内接する正n角形の面積 S」 (2) 円に外接する正n角形の面積 S2 08S C BU C →例題48 2 第3章

関係詞、仮定法の単元の間違い探しです。正直どれも正解に見えて、わからないです。どなたか教えてください。

回誤りを含む英文を3つ選び、 記号で答えなさい。 (5) ア Yesterday I was spoken to by a woman whose name I could not remember. イ This is the temple which the guidebook says was built in the 7th century. ウ The people whom I work can speak Chinese. エ Bangkok is a city where you should visit once. オ From what you wrote in your letter, you don't agree with our plans. カ What is important is that we have only two days left before the deadline. キ Paris which is the capital of France has many famous museums. ク Wherever she travels, Jessica makes friends. ケI clearly remember the wonderful days which we spent in Paris five years ago. コ July fourth is the day when Americans celebrate their independence from Great Britain.

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23:11 7月7日(水) 全@ 65% A olt.toshin.com 【修JI 難度別ソステム央譜 文広編」 (7/9) 文法(下線部言い換え) 判定 B テストコード 問題ID 受験日 得点 受験回数 3004511201 274566 2021/07/07 3/10 3 ●正解の閲覧について 解答表示 第7問 下線部の語句と置き換えても,文の意味がほとんど変わらない語句 を下から1つ選べ。 (1) It is much colder today than yesterday. [1] very too 3 far の less There isn't any milk in the bottle. is no の is a little ③ is little の is some 3] 3 Don't be (3) You must not be nervous. [ Not be の Not being ④ Be not The plane left Tokyo at night, and arrived in Seattle in the morning. [ 4] 0 arrived arriving being arrived の to be arrived (5) I remember that I visited the town. [ 5 ] 0 visiting visited ③ have visited の to visit (6) Because it is a holiday, we don't have to go to school. [ 6 ] 3 For ① So 2 Since の Though (7) She should get up early. [ 7] の have to was able to ③ must to のhas to (8) There are almost no students in the classroom. [ 8 ] の little 0a few (9) Let's go to the movies together. [ 9 ] 0 Can't we 2 Will we (10) Would you mind if I smoked in this room?[ 10 ] 0 my smoking 2 I smoking 2 a little 3 few 3 May we OShall we の me to smoke の me smoke

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23:11 7月7日(水) 全@ 65% A olt.toshin.com 10 分 制限時間 9分 所要時間 【修了】難度別システム英語 文法編」 (4/9) 文法(空所補充) 判定 B テストコード 問題ID 受験日 得点 受験回数 3004511201 274563 2021/07/07 3/10 3 正解の閲覧について 解答表示 第4問 空所に入る適当な前置詞を,下から1つ選べ。ただし同じ記号を 何回選んでもよい。 (1) My brother succeeded [1 ]the project. (2) We had a good time listening [ 2 ] the radio. (3) This is, [3 ]a sense, a serious matter. (4) My sister is married [ 4 ]an artist. What are you laughing [ 5 ]? (6) The old building is made [6 ]wood. (7) It is natural [ 7 ]her to ask for his help. (8) I lent my comic book [ 8 ]him. (9) She was satisfied [ 9 ] the room. (10) What is the tallest building [ 10 ]London? 0 for の on 6 by O in 2 at with 6 from O to 8 against @ of

すみません。ここの問題を文字式のルールを使って、教えていただきたいです。お願いします。

3,点 Chonce 原価の円の品切に3刺の利益を月込んで完価を フけたが完れなかったため、定他の2室割引で (女字式のルブ) このときの利面をひを使った式で表せ。 売った。

問1〜問4の答えはこれで合っていますか？ 教えていただけると助かります！！ よろしくお願いします！🙇‍♀️

A 次の問1~4の会話文中の空所に入れるのに最も適当なものを, それぞれ下の1~4の うちから一つずつ選び, 番号で答えよ。 問1 Jen : Can you tell me how to get to the new art museum? Mayuka: Sure, but ( Jen :Why do you say that? Mayuka : The tickets always sell out quickly. You may not get in. I suggest buying a ticket on their website in advance if you want to get in. 1 it'll be a good plan after all 2 itll be a waste of time 3 it's a good day to go 4 it's too far from here 問2 Sora:IwishI could_afford to go to the concert tonight, but tickets cost too much. 今社給がわる Lily :Didn't you know that we can get an 80 % student discount on concert tickets? Sora:( Lily : No! We can. Just show your student ID at the box office when you purchase それット売り場 your ticket. 1 Can you afford a new student ID card? 2 Can you count all of the concert tickets? 3 The concert will be held in the box office. 4 You've got to be kidding me!

赤線を引いてるところでなんで答えがmeansになるのか教えて欲しいです。 お願いします🙇‍♂️

range of tools we use is amazingly wide.(1)Tool use was once thought to be one of the features that set humans apart from other animals. To be sure, humans have developed and used mechanical, electric and electronic tools for multiple purposes.(2)In no other animals can we see such sophisticatedand elaborate use of tools. To us humans tools are an important (b)(1.meaning 2.means) to control and manipulate our physical environment. (C)(1.During_ 2.While ) the development of civilization, humans'use of tools has improved and diversified. We humans not only use tools but make and develop a variety of new ones for different purposes. We can(d)(1.even 2.ever ) use tools to make other specific tools. In addition, the use and making of tools is handed down from generation to generation. Tool use by humans is not genetically transmitted by DNA (e)(1.and 2.but)

答えがないので答え合わせお願いします🤲

UNIT 2 Perfect tense 完了形 1ポイントの確認 日本語の意味に合うように, ( )に適切な語を入れなさい。 hat Olayc ased all my 私はもうお金を全部使ってしまった。 1 L4の money. has)c jast)tinishel 2 Henry ( homework. his 2 ヘンリーはちょうど宿題をやり終えたところだ。 L42 have)visited London twice. 3 I( 3 私は2度,ロンドンを訪れたことがある。 L4) (Have you ever ( chmfehm Mt. Fuji? 4 今までに富士山に登ったことがありますか。 4 L4 の hoven fecen haren been 5 I( ) busy since last Monday. 5 私は月曜日からずっと忙しい。 L46 paidagnn 私は2時間,テレビを見続けている。 6 I( hours. for two 6 L4 6 2ん t> ativet n t 7 He ( here last night. 7 彼は昨夜ここに着いた。 Plus の 8 I( have)( met)him lately Tfsal 8 最近彼に会っていない。 Plus S hat alray Softed holochcreh liscnedh leen Jen smapungn hnd raoe 9 The game( 9 私たちが着いた時,すでに試合は始まっていた。 L5 0 when we arrived.' od be 10 私はそのCD を買うまで、彼の歌を1度も聞いたこ L5 の とがなかった。 his song 10 I( before I bought the CD. d had sick for a week when 11 チカが私を訪ねた時、私は1週間ずっと具合が悪かっ L5 ③ た。 Ho sd t b 12 電話が鳴った時,私は2時間ずっと勉強していた。 Chiká visited me. L5 の for two 12 I( hours when the phone'rang. N 1 r i ef 13 I (yealized thatI ( umbrella in his car. 私ば彼の車の中ばかさな無き忘れたことになづいた。 1L5 my 13 avec finidhd tain 14 3時までには、コンサートは終わってしまっているだ L5⑥ 14 The concert ( ろう。 by three. 15 I ( pill 20 1ove(ATckeh a the movie 15 もう1回その映画を見れば、私はそれを2回見たこと L5の twice if 1 ( WATCH)itagain. ( Are)( le になる。 yuing L5 6 16 来月で私たちは結婚して20年になる。 16 Next month we ) for twenty years. ( to 3を解くときの山折り線 5

答え合わせのため答えを確認したいです

B Complete each sentence below with one of these words or phrases. Remember to use the correct word form. harvest take root urbanization vanish endangered 1. He was a loving husband until one day he walked out of the house and never to be heard from again. more and more 2. Since interest in organic food has organic produce shops are opening. 3. Thanks to conservation efforts, some rebounded and are once again thriving. species have 4. In the fall, the villagers work together to gather the 5. has reduced rural populations worldwide.

長文の下の9番の答えを教えください

measures to encourage tap water use. In Britain, bottles restrict the consumption of bottled water. In the United States, the Conference of Mayors in 2008 voted to take of water are no longer served at government meetings. 4 Around the world, many countries have started to VBWB restrict [ristrikt] consumption [kansámpJen] conference [ká:nfarans] mayor(s) [méior(z)] measure(s) [mézar(z)] 1-サムフェーし コv15しス government 5 [gávarnmont] Clearly, the movement against bottled water is growing. significant significant [signífikant] カンサプンョン B while the consumption of bottled water is a environmental concern in the developed world, the lack of concern [kansá:rn] clean drinking water is a major health problem in the developing world. developingldivelopig) The World Health Organization has 10 billion [biljan] found that over one billion people, mainly in poorer whatsoever [wAtsouévar] supplies [saplaiz] <supply portion [p5:r an] Countries, have no access to safe water whatsoever. 6 In order to improve world water supplies, some companies in the U.S. have started donating a portion of donation(s) [dounéijon(2)) sales from bottled water. Donations and lifestyle changes 15 will not immediately solve these global problems, but they direction [darékfan] are a small step in the right direction. Remember this the next time you think about buying a bottle of water. 9. in the developing worldと対比されている表現を抜き出しなさい。 3. the Conference of Mayors (全米)市長会 3. take measures 対策を講じる 10. the World Health Organization 世界保健機関 (WHO) 12. no access to safe water whatsoever = no access to safe water at all