数A【空間図形】の問題です。 教えてもらいたいです。🧑‍🎓 問題の答えを見ましたが、どうしてその様な式になるのか分かりません。 （1）の答えに載っている式の数字は、何の数字なのか、 （2）の答えの式はどうしてその様な式になっているのか

例題 正四面体に内接する球 56 1辺の長さが2の立方体ABCD-EFGH を平 面 BDE, 平面 BEG, 平面 BGD, 平面 DEG で切ると,正四面体 BDEGができる。 この とき、次のものを求めよ。 (1) 正四面体 BDEGの体積Ⅴ (2) 正四面体 BDEG に内接する球の半径r 228 8 19 空間図形と多面体 8 2√3 V=4V であるから 22=4.2/3 3 A CE -r B 解答 (1) 正四面体 BDEG は, 立方体ABCD-EFGH から合同な4つの三角錐 ABDE, FBEG, CBDG, HDEGを除いたものである。 よって求める体積Vは D H₁ F 1/11/11/12/12/12 (12/2)}=2/3 ・△BDE ・r= - 1/1 ( 12 · 2 √/2 ·(√3³·2√/2)) · r = ²√3 3 よって V=2'-(1...12.2.2)×4-1/2 3回 (2) 正四面体 BDEG に内接する球の中心を0とすると, 正四面体は合同な 4 つの四面体 OBDE, OBEG, OBGD, ODEG に分割できる。 四面体 OBDE の体積をV とすると V₁=1 /3 r==23 3 JOHA問題 163 G 答

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10 Reading 日曜の訪問 uzaki A 次の英文を読んで、 問いに答えなさい。 (32点) most every day. Last Sunday my friends and I visited a home for old people* First, we sang some songs for them. Some of them sang with us. We did a lot of things together. They (1) (to/us/play/ how / showed/games XB / some). I was interested in origami. I learned how to make boxes dad yneM.I 5 with paper. (2) It was a lot of fun. Some of my friends were makingom (s) aid diw luqmos [ 16 S notes home for old people A-4 taketombo. Others were playing cards playing cards. (A) 25167d5 (95 (b) admila (5) After we had lunch, we went out into the garden. There were me all night Moig (6). porade (d) Sysbot [ ]odi adW A € many plants there. An old man showed us how to play with flowers K and grass. He made a whistle* with grass and made a sound with •Sure, ou ail: a onny efore heals, Tony. whistle (3) it. A woman knew the names of the trees and flowers very well and taught us about them. And we sat in a circle* and some women told us some old folk stories. The stories were interesting. 2.radinta!! USKOR We really enjoyed the day with them. When we were leaving, they of bib woH said, "We had a very good time. Please come again." If I have another chance, I really hope to visit the home again. N in a circle 輪になって 民話 folk story SAHU (193 words) の文字も小丈夫になっています。

英語の文法問題です。 解説お願いします。

科学者たちが「ホーキング放射」と呼ばれるものを発見したのは1970年代だ。 It was (called / discovered / in / scientists / that/ the 1970s / they / what) irlw woled snilsmit od 16 dood "Hawking radiation." etnové bar inoltzeup pniwallabant pobla poibrani ventiq & ritiw yiotzi zirs tuode

答えに辿り着ける気がしないです。賢い方お願いしますm(_ _)m

3数 01, 02, 0gに対し Sin30=3sind 4sin³0 Cos30-4005³0-30050 が成り立つとき, cose + cos₂ + cos03 = 0, sine + sino₂+ sin03 = 0 (01102) (0305 - Sin 0₁16₂) SmU3) 13 90²) 300 (0₁-02) +03) cos30₁ +cos30₂ +cos30=3cos(0₁ +0₂ +03), sin30, + sin30₂ + sin303=3sin(0₁ +0₂ +03) が成り立つことを示せ . -C053 01 + 0053 0₂ + 0-330 3 = (4005²³0₁ - 360501) + (4005³0₂-30030₂) + (4 005 03-300503) 4cos³0, +40³024005393 3005 (₁10₂) + 035 = 3 { Cos (0170₂) cos 03 - Sin(01-0₂) sin 03 } : [ I = 3 { (Cos 0₁ Cas(₂ - sind, sino ₂) cos 03 - (Sind; 005 02 +00s 0₁ Sinda) si-03 = 35 (050,100² 02 - Sindisinde) (-call-co) (sind, code to th) shu 0.-son)

このeitherの役割ってなんですか？訳見てもよくわかりません😭

minutes. processor's But multitasking is one of the great myths of the modern age. Although we think we Juoda Jmsw (**) are focusing on several activities at once, our attention is actually jumping back and forth bomledw nying balat between the tasks. In reality, a single-core computer processor cannot truly multitask long ord o either; it actually switches back and forth between tasks several thousand times per second, thus giving us the illusion that everything is happening simultaneously. ord de to ord hut not, unfortunately, the same results.

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100 明日はそれぞれ線分 AO, 線分BO, 弧AB上の点であり、 四角形CODEは正方形である。 また,Fは,弧BEを3等分 (②2)図で, AOBは線分AOを半径とするおうぎ形で,C,D, する点のうち,Eに近い方の点である。 AO=12cmのとき,次の ①,②の問いに答えなさい。 ① 次のかな符号にあてはまる数字を答えなさい。 BFの長さは, ア cmである。 ba 3 47 E 3 λ B TUN D

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After World War II, people in Okinawa were suffering ( P ) hunger. Therefore, Uchinanchu in Hawaii decided to send 550 pigs to Okinawa and the pigs saved many people's lives there. About sixty years later, the members of BEGIN were impressed by this episode in history. So, they decided to send the same number of musical instruments as the pigs to Hawaii. The band hopes their presents will deepen the relationship between Hawaii and Okinawa for many more years.

教えてください

After World War II, people in Okinawa were suffering ( P ) hunger. Therefore, Uchinanchu in Hawaii decided to send 550 pigs to Okinawa and the pigs saved many people's lives there. About sixty years later, the members of BEGIN were impressed by this episode in history. So, they decided to send the same number of musical instruments as the pigs to Hawaii. The band hopes their presents will deepen the relationship between Hawaii and Okinawa for many more years.

教えてください

After World War II, people in Okinawa were suffering ( P ) hunger. Therefore, Uchinanchu in Hawaii decided to send 550 pigs to Okinawa and the pigs saved many people's lives there. About sixty years later, the members of BEGIN were impressed by this episode in history. So, they decided to send the same number of musical instruments as the pigs to Hawaii. The band hopes their presents will deepen the relationship between Hawaii and Okinawa for many more years.

教えてください

After World War II, people in Okinawa were suffering ( P ) hunger. Therefore, Uchinanchu in Hawaii decided to send 550 pigs to Okinawa and the pigs saved many people's lives there. About sixty years later, the members of BEGIN were impressed by this episode in history. So, they decided to send the same number of musical instruments as the pigs to Hawaii. The band hopes their presents will deepen the relationship between Hawaii and Okinawa for many more years.