（1）の1番下から2番目の行まで分かるんですがそこからなぜBD:DC＝AB:ACになるのかが分かりません😖解説よろしくお願いします🙇

divide pile lack 不足 adiustだわる an 206 基本例題 128 三角形の内角の二等分線の長さ (1) (1) △ABCにおいて,∠Aの二等分線が辺BCと交わる点をDとするとき, BD: DC = AB : AC が成り立つことを証明せよ。 (2) △ABCにおいて, BC=6,CA=5, AB=7 とし, ∠Aの二等分線と辺 BCの交点をDとする。 (1) を利用して線分 AD の長さを求めよ。.m ŠVAŠKHÉMOE 120,121 CHART & SOLUTION 三角形の内角の二等分線の長さ ① 余弦定理の利用 2 面積の利用 三角形の内角の二等分線については, (1) のような性質がある。 この性質を利用して, (2) で は余弦定理を使って AD の長さを求める。 438160 ② 面積の利用は,後で学習する (p.214 基本例題 133 参照)。 解答 (1) ∠A=20,∠ADB=a とすると, △ABD BA Ply ( と△ACD において, 正弦定理により (75° 20180°-α 100 700m 455 BD sine AB sina' DC ACO sine sin (180°-a) in よって B sine sing AB, DC = BD:DC=AB:AC D sin (180℃~g) = sing であるから,これらを変形すると sine AC BD= sina C d DAA Const M asing B D CRE 図において, AD // EC と すると, ∠AEC=∠BAD =∠CAD=∠ACE から AEAC CHARTI FRISES 1 ABCに albco 三角形の 等式の証人 (2) に代 余 BE

赤線を引いた部分 同じcome で 同じSVC なのに 違う意味ってどう言うことですか？

分詞形容詞は付加的Cにもなる He died young. 「彼は若くして死んだ」 は "He died." という文に状態を示す形容 詞 young を付加したもので die 「死ぬ」 の意味は変わりません。 He came running. 「彼は走って来た」 においても, “He came.” に現在分詞 running を付加したもので, came 「来た」 の意味は変わりません。 このときの come は be 動 詞の仲間の come 「 …..になる」 とは違いますね。 このように, Viに分詞形容詞が付加 されたにすぎないときも, SVC の文型と決定します。 前置詞句・副詞がCに 前置詞句が形容詞句としてCになっている例を挙げましょう。 These two houses are (of) the same age. ｢この2つの家は築年数が同じだ」 That sounds like a good idea. 「それはいい考えのように思える」 副詞がCになる例は多くないのですが, 副詞の形容詞への転用があります。 The TV is on/off. 「テレビはついている / 消してある」 文と第2文 e, buried は bury (Vt) の過去形ではなく過去分詞です。 のコンピューターはの状態である 埋もれた の下に 山 の ファックス ice computers lie buried (under a mountain) (of paper, faxes, ...) Vi C (過分) M burie lie 「 まし Sounta 事態 紙 M なら 「埋もれさせられ (てい) る→埋もれ (てい) る」 の意味です は変です。 lie は be 動詞の仲間 (5課) で C を必要とすると ried で 「埋もれた状態にある」という意味を表しています。 a の山→山のような (多量の)N」です。 悪く 職場は を増やしている (そ) 紙の 使用量 だけ 6パーセント rse: offices are increasing their paper usage (by 6 percent) C S Vt (進) O 氏を大量使用している) 事態」 で, get の後の worse は形容詞 hadの

(3)を教えてください

2) 13x13 330のとき 3x <3 x<1 3x<0 XCORE -370 <3 x7-1 。 1 =-11220 数学Ⅰ・数学A (注)この科目には、選択問題があります。 (25ページ参照。) 第1問 (必答問題) (配点 30) 3 Ex [1] kを定数とする。 (1) 実数xについての不等式 |3x-k+2|<k+1 を考える。 k=2のとき, ① の解は ① 3231-2 x≧5のとき 32-k+2 <ktl 3人<2R-1 x <2k-1 3 2R-1 アイ<x< アイ <x< である。 k> エオ のとき, ① の解は ウ 32. 13x1-3 53270 x20 2 k- キ ク3 であり, k≦ エオのとき, ① を満たす実数xは存在しない。 3x-R+2 <O 3x <3 0<x</ 3x <k-2 - 26- 3x <0 x<0 32+/-2</²+1 3x <3 x>-1 k-2 -1<x<3 -3X <3 x>-1 tax<0 (数学Ⅰ・数学A 第1問は次ページに続く。) kx2 3 ① 22-1 01 (2) 実数xについての不等式 13x-3k+2\>3k+1 を考える。 る。 Leasing 12/70 x<0 0<x 0以外の実数 ② を満たさない実数xが一つだけ存在するのはk= ks It である。 シ 3R+1=0 の解答群 be | > -1 3R =-1( 'R = -3 (3) 連立不等式 「 ① かつ ② 」 を満たす実数xが存在しないためのkについての 条件は または k 3R+1 ①≦ 数学Ⅰ・数学A ス ケコ -27- サイ (2) のときであ (3) N (数学Ⅰ・数学A 第1問は次ページに続く。)

英語の文法問題を解いたのですが、写真の問題の答えに自信がありません。どなたか丸付けしていただけないでしょうか？もし間違っていれば、ポイントも付けていただけると有り難いです。お願いします。

2 10. It was because she was ill ( as 2 for P 11. I can't remember ( that 12. It's not ( 2 during 13. The First World War? What ( eighteen. 1 on world in the world that ) it was that I was supposed to tell you. 2 what 3 before this ) we go abroad that we realize how crowded Japan is. 2 until 3 by 4 while (福岡大) ) do I know about the First World War ? I'm only 16. There were very few people, if ( Dany (2) ever 18. What ( ) we cancelled our date. 14. What on ( ) is the matter with you ? space 2 world earth 4 way 15 Would you read this letter I've written in English and correct the mistakes, ( Cofit if any 2 if some 3 if something deadly radiation ? earth 2 on the earth 4 in earth 17. We can get serious diseases such as liver cancer, which, ( increasing at present. although (2) as about if anything hot a fool at all (3) a fool to a considerable degree ), who actually saw what happened. 3 many 4 not 3 even 4 for wrong 2. Gambling was by no means his only source of income. definitely X かわらず nevertheless X (立教大) (大阪程大) › hydrogen bombs were used to poison the atmosphere and expose us to (34 (2) at a great distance from a fool no more than a wise man (京都外大) (四天王寺国際仏教大) )? (大) ) rare in the past, are 次の各文の下線部に最も近い意味を持つ語句を、 下の①~④から一つずつ選びなさい。 1. He is far from being a fool. "B" 2 certainly not het u Ⓒinevitably (日本工大) (明治学院大)

論理表現の問題を解いたのですが、写真の問題の答えに自信がありません。どなたか丸付けしていただけないでしょうか？もし間違っていたら、ポイントも付けていただけると有り難いです。お願いします。

2 10. It was because she was ill ( as 2 for P 11. I can't remember ( that 12. It's not ( 2 during 13. The First World War? What ( eighteen. 1 on world in the world that ) it was that I was supposed to tell you. 2 what 3 before this ) we go abroad that we realize how crowded Japan is. 2 until 3 by 4 while (福岡大) ) do I know about the First World War ? I'm only 16. There were very few people, if ( Dany (2) ever 18. What ( ) we cancelled our date. 14. What on ( ) is the matter with you ? space 2 world earth 4 way 15 Would you read this letter I've written in English and correct the mistakes, ( Cofit if any 2 if some 3 if something deadly radiation ? earth 2 on the earth 4 in earth 17. We can get serious diseases such as liver cancer, which, ( increasing at present. although (2) as about if anything hot a fool at all (3) a fool to a considerable degree ), who actually saw what happened. 3 many 4 not 3 even 4 for wrong 2. Gambling was by no means his only source of income. definitely X かわらず nevertheless X (立教大) (大阪程大) › hydrogen bombs were used to poison the atmosphere and expose us to (34 (2) at a great distance from a fool no more than a wise man (京都外大) (四天王寺国際仏教大) )? (大) ) rare in the past, are 次の各文の下線部に最も近い意味を持つ語句を、 下の①~④から一つずつ選びなさい。 1. He is far from being a fool. "B" 2 certainly not het u Ⓒinevitably (日本工大) (明治学院大)

汚くてすみません！ この問題の添削をお願いしたいです！！

Date people I agree with more should become vegetarians in the future. I have two reasons. Firstly, it is bad for the environment to have live stocks. Having live-stacks have many bad prints For instance, farmer have to use large water. By using whater too much, gloval. warming will be increasing. Also, farmer have to make food for animals, so they will use large gas or electric.. Secondly, metabora they eat a • because th lot of wents or fishs. Meat and fish contain ail, so they attect our health badly. Vegitable have less oil, and enough nutrients. Many people will protect their health, and Can live longer. Therefore, it is good for us to become vegetarians. I think we should eat only vegetable.

汚くてすみません🙇‍♀️ 英検の準一級の作文の添削をお願いしたいです！！

I disagree that Big companies have a positive effect on society. I have two reasons. Firstly, it is bad for the environment to produdet @ [arge-scale products. Big company mode a lot of products so they use maturials such as water, electric, and gas@ Also, they discharge carbou dioxide. By doing so, global warming will be increasing. Secondly worker is difficult to grotect! Work-life balance. Big companies ask them for many job 1,0 Go they will home go at late night. Also some peode have to move their house for working. They will lose their free time, and fell,. tired. Therefore, big companies have a lot of bod points. I think people should work widdle or small companies than big companies will have a happy lifel. and google

英検準1級ライティングなのですが、ここ減点されるなどあったら教えて頂きたいです。

英検準1級 Some people trust information On I the agree I To Pic Should people trust information say that it is good for Inter het. on the other hand, other with the think so. is false posts. The other latter are on say idea and V the Internet? hot. have Date us two to why Ohe reasons that information. information on the internet lack certainty. These days. the number of people who Social media is increasing. It may seems good trend. deceive us by posting However, there people who try to reasons use No. reason is that it is difficult for us to judge accurat If you do online shopping, you would refer to the evaluation. of thing you. consider buying. We do not know who write the review. Furtt rmore, not everyone who purchased the product. write review. All in all, It is for the reasons. mentioned above that you shouldn't believe everything writen on the Internet. J140

英語の穴埋め問題です。分からないので解説して頂きたいです。

(D) as necessary PART 6 Text Completion (長文穴埋め問題)(4問) 次の文の4つの空欄に一番適当と思われる答を(A) (B) (C) (D)から選びなさい。 Text: Notice a Attention all patrons of the Maxwell Kent Theater Company: 1. We will be undertaking extensive renovations throughout the summer. We will be- the dressing rooms, adding a new bar lounge area in the atrium, and increasing our seating capacity from 1,500 to 2,000 seats, which will involve redesign of the main theater. We expect the dressing rooms to be completed by the middle of July, and the bar lounge to be open for business by the beginning of August. We are not sure how long the seating increase will take, but work is to be finished by late September. This is subject to 2. ----- 3. 4. qui change, however. --- 1. (A) rehabilitating (B) reviewing (C) remodeling (D) reviving nom 2. (A) partial (B) partly (C) parted (D) part 3. (A) resolved (B) concluded (C) decided (D) estimated 4. (A) We anticipate huge crowds to enjoy our plays during this period. (B) If you would like to audition for any of our summer productions, go to our website. (C) We appreciate your cooperation and patience during this time. (D) We are pleased to announce our upcoming summer-season line-up of great plays.

数量を表す表現の誤り訂正がよくわかんないです…2番はofかと思ったんですが、よくわからないので1から6まで解説していただきたいです❗宜しくお願いします❕

4. 私が着いた時, 部屋の中はかなりの客で混み合っていた。 (愛知工業大*) When I arrived, I found the room crowded with 3 文法上の誤りがある部分に下線を引きなさい。 few guests. 1. International visitors coming to Japan are increasing. 2. Most my classmates want to study abroad. 3. A great deal of students have been absent from school this week. (**) 4. How many pieces of baggages do you have? (€Ð¥&★*) 5. Regrettably, only two-third of the money was recovered. 6. The amount of barrier-free tours for the elderly traveling around Japan and overseas is gradually increasing. (*********) sue/suit = 5 sue (3), suit (2), pursue (3), pursuit (). issue (. XT)