答えが赤で書いた方なんですけど、シャーペンで書いた方でも丸ですか？

SREEL 2 次の図で, AB: DE=AC : DF である。 あと1つ条件をつけ加えて, △ABC~ △DEF となるようにしたい。 あとの問いに答えなさい。 JOHAA & DON OG MAJAL A Ac B ATFES (1) 角について1つ条件をつけ加えるとすれば, どんな条件ですか。 HANDS C ETAAS CE <BAC=∠EDF <A=<DAD SAN

なぜ1×7/3になるのですか？

問題 右の図において, 4点A, B, C, Dは2つの放 4 物線と直線ℓとの交点である。 Aのy座標は 1, Bのx座標は-1であり, AB: BC =3:7で ある。 (1) Cのx座標は (2) D の座標は [解説] 1 (1)点Aはy=-x 上の点だから, これに.y=1を代入し,x<0よりx=-2 A (-2, 1) ここで点AとBのx座標の差は, -1- (-2)=1であり, AB : BC = 3:7だから,点CとBのx座標 の差は, 神技 11 (本冊 P.15) より, 7 7 1 x = 3 3 よって点Cのx座標は, 7 4 3 3 -1+ |であり,a= である。 である。 = = 2 3a + (2)点の座標 二3 TI (9) このことから2点B, C を通る直線の式は神技 54 (本冊 P.96)より, 4 片は0になる = a(− 1 + ²/3 ) x − a × ( − 1) × 3 = = = ax + z za 4 y 4 - a= 3 2 y=-x² 1:40:05 A B 式(ア)は直線ℓ と一致するから, (ア)にx= -2, y=1を代入し, co #518|1=₁¶ _1 (8) (-2, 1) A して 3 (00.1#4#HANDM A 3a... (7) GAD MA 〈大阪星光学院高等学校・一部略) 問題 P.101 B -1 [ = DS JANES y=ax² 解答 y=ax2 -2. (3.1 B (順に) x 43 3'2

この問題がわからないので答えと解説よろしくお願いします。m(_ _;)m

幅30cmのブリキ版がある。 右の図のように折り曲げて 2 切り口が長方形のといをつくる。 切り口の面積を88cm² 30cm にするには、といの高さを何cm にすればよいか。 Chandangtrang cm

(4)教えてください😢

d v 5 1辺の長さが2cmの立方体ABCD-EFGHがある。辺AB, BC, Wodi SLboo D P. CD, DA の中点をそれぞれP, Q, R, S とする。次の各間に答え B, cly Q なさい。 n (1) PQの長さを求めなさい。( da! (2) 4点B, P, Q. Fを結んでできる四面体BPQF の表面積を求 bona めなさい。( H E l (3)立方体 ABCD-EFGH から4つの四面体 BPQF, CQRG, F ンGlino DRSH, ASPE を取り除いて残る立体の表面積を求めなさい。( (4) RS の中点を M, QF の中点をNとするとき, MN の長さを求 M R P. めなさい。( hne bs nist odsmot Thand tde Yodh mol w N botonq ao ool siadi anilem H Wat GL t boaraleuer

お願いします

Do you like dogss OU He dogs7 People ay tha dogs ae me oldew fiends orhumans Some 所 Te Vi People as Pets o tnlk about some Dogs we led by many peopls。 Now Tm gomg kinds of dogs w 「 Tes Working fordiabled peopkk。 They are not pes。 Toy are saiiance dogE 1p Japan。 there are three kinds of assistanee dogs。 They are gnide dogs。 service doB3 and Teng dogy Tody。 jn Japan。 more tan a momsand ssshtance dogs work for diabled PeoPIe To of thom are guide dogs。 The mumber of senrice dogs and hearing dogs is mot So large 人 OF Mey 1 2017。 here were onby abowe seveny senoe dogs mm Japan。 The number of hearing dogs was about he same. Guide dogs work for peopls who cannot see。 Guide dogs lead thc users when hy 8O 9 Herent places。 The dogs walk with the uscrs and gnuide them im a sefc way。 For Purposc。 guide dogs are ( A ) to go stmight along the road。 The users know hhe situaon j front of them thanks to the dogs、 and give dmectoons to the dogsy such as Wai FComer md “Sright go.” We can say that a gnide dog and the user work together to walk safely。 Service dogs work for people who cannot use their ams or legs ficcly。 Scrvice dogs do a Jot of things in daily lives for such people. For example。 they pick up things on the floor opcn. and close doors, and bring things from other places。 When something dangerous happens。 the dog can even run to some other people and ask thcm for hclp。 We can say that service dogs [で①語 Hearing dogs work for pcople who cannot hear。 Haring dogs can understand many kinds or sounds。 such as phones alanm clocksr cping babics nd so on。 The dogs 【 by /tel/ is heard / usi ig / thc users / their / what sound 】bodies: ER lece。 the dogs ouch the users and lead them to the place。 Hearing dogs can tcll many kinds of sonnds to the users and help them The law about assistance dogs says that they can go with the users imto many places Hike Testanrants, supenmarkets, and so on. So you have many chances to see thcm。 But you should amember one important thing about them。 Assiance dogs are not pets。 They are working 5r the users. so you must not talk to them or touch them。 OF course you must not give them ay food. Asshtance dogs md the usems respect eech othier ss Partnets。 When you meet an ssistance dog and te uscr in town。 just see what they dO。 TF they need some help。 lers ghve them a hand.

お願いします

Do you like dogss OU He dogs7 People ay tha dogs ae me oldew fiends orhumans Some 所 Te Vi People as Pets o tnlk about some Dogs we led by many peopls。 Now Tm gomg kinds of dogs w 「 Tes Working fordiabled peopkk。 They are not pes。 Toy are saiiance dogE 1p Japan。 there are three kinds of assistanee dogs。 They are gnide dogs。 service doB3 and Teng dogy Tody。 jn Japan。 more tan a momsand ssshtance dogs work for diabled PeoPIe To of thom are guide dogs。 The mumber of senrice dogs and hearing dogs is mot So large 人 OF Mey 1 2017。 here were onby abowe seveny senoe dogs mm Japan。 The number of hearing dogs was about he same. Guide dogs work for peopls who cannot see。 Guide dogs lead thc users when hy 8O 9 Herent places。 The dogs walk with the uscrs and gnuide them im a sefc way。 For Purposc。 guide dogs are ( A ) to go stmight along the road。 The users know hhe situaon j front of them thanks to the dogs、 and give dmectoons to the dogsy such as Wai FComer md “Sright go.” We can say that a gnide dog and the user work together to walk safely。 Service dogs work for people who cannot use their ams or legs ficcly。 Scrvice dogs do a Jot of things in daily lives for such people. For example。 they pick up things on the floor opcn. and close doors, and bring things from other places。 When something dangerous happens。 the dog can even run to some other people and ask thcm for hclp。 We can say that service dogs [で①語 Hearing dogs work for pcople who cannot hear。 Haring dogs can understand many kinds or sounds。 such as phones alanm clocksr cping babics nd so on。 The dogs 【 by /tel/ is heard / usi ig / thc users / their / what sound 】bodies: ER lece。 the dogs ouch the users and lead them to the place。 Hearing dogs can tcll many kinds of sonnds to the users and help them The law about assistance dogs says that they can go with the users imto many places Hike Testanrants, supenmarkets, and so on. So you have many chances to see thcm。 But you should amember one important thing about them。 Assiance dogs are not pets。 They are working 5r the users. so you must not talk to them or touch them。 OF course you must not give them ay food. Asshtance dogs md the usems respect eech othier ss Partnets。 When you meet an ssistance dog and te uscr in town。 just see what they dO。 TF they need some help。 lers ghve them a hand.

求め方が分からないので、教えていただきたいてす🙇🏻‍♀️ 答えは6cm²です。 お願いします

ABCD の辺CD上に点Pを, (CHANDD到1 軸 との交点を0とする。 どらABCDの面積が20cm のとき, を求めよ。