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數學 國中

有人可以教教怎麼解25題嗎?謝謝

A 12 C B Bu C 圖(九) 圖(十) E INF Ba C 20. (十一) 日人如圖(十),△ABC和△ECD 皆為正三角形、B、C、D三點在同一條直線上,若ĀB-2,CE=4,則以下何者錯誤? (A) BE=2√7 (B) 2BE=3BF (C) 2BC=3CF (D) AB//CE 【1-3】 P.22. 如圖(十一),梯形ABCD中,AD=4,BC=20,若E、F兩點分別在XB、CD上,且AD//EF//BC,KE:B= 1:3,則梯形EBCF的面積是梯形 AEFD 面積的幾倍? (A)4 (C)6 (B) 5 (D) 7 【1-2】 EBC PAB11 = 4671 F) 23. 圖(十二)為一張正三角形紙片 4BC,其中D點在AB上,E點在BC上。今以DE為摺線將B點往右摺後,BD、配分 別與AC相交於F、G點,如圖(十三)所示。若AD=50,AF=80,DF=70,FB=40,則CE的長度為何?【1-3】 (B)63 (C) 55 (A) 72 (D) 45 △ADFNA BGF - "1 50 D A 80 50: 64 80: ko 8425 70: GF=80=40 F 20 GF 35 B&L=160-115:45 GAADENALGE B C B 160. CE = 72 圖(十二) 圖(十三) 4 E 4 F 4 D (12) 14 16% =48- 12 3G 3 H 3 I 3. C 圖(十四) C、24.如圖(十四),平行四邊形ABCD中,E、F兩點將AD三等分,G、H、I三點將BC四等分,若△HAF與△EGI 重疊 區域(四邊形 EPHQ)的面積為24,則平行四邊形ABCD的面積為何?【1-2】 (A) 144 (B) 160 (C) 168 (D) 192 25. 如圖(十五),△ABC中,D、E、F三點分別在AB、BC、AC上, 已知AD:DB=1:2,BE:EC=1:1,CF:FA= 1:3。 若AE與DF相交於P點,則AP:PE=?【1-2】 2 D 1 (A)3:4 (B)4:5 (C)5:6 (D)6:7 二、非選擇題:20分(請在答案卷上作答) 6 B C E 圖(十五)

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數學 國中

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(41~43) At some stores, people get stickers or stamps on a card when they spend money there. After they collect enough stickers or stamps, they can get gifts or buy things at low prices. Yesterday after I bought coffee; the clerk stamped on my cellphone. How cool it was! My first time! It looks like a stamp we used in the past, but there are many small dots at the bottom. You touch the screen of your cellphone to tell it what to do, and this is also the way smart stamps work. When people use a smart stamp, they hold the top part of the smart stamp. The small electrical charge from people's hands goes through it to the dots at the bottom. Then, the smart stamp tells your cellphone messages with them. The dots of different stores are in different patterns. no alla lil est sill lo busolos With smart stamps, stores don't have to make stickers or cards, and people don't have to keep those things. Stores can also collect some useful information. For example, how many people come and buy things or what is popular? Are there any other good things about smart stamps? Are there things people need to be careful with when they use them? We can know more after smart stamps become more common. sticker 貼紙 electrical charge 電荷 message訊息 pattern 圖案 ( ) 41 Which picture best shows how electrical charge moves when someone uses a smart stamp? (A) (B) (C) (D) MA ( ) 42 "Are there any other good things... become more common." What did the writer want to say? (A) Not everybody needs to use smart stamps. (B) Many people worry a lot when they use smart stamps. (C) Let's learn more after more people experience using smart stamps. (D) Stamps are not common, so people may think about giving them up. ( ) 43. In the reading, the writer mentioned: a. Why people use smart stamps. b. One new thing in the writer's life. c. How smart stamps work. In what order did the writer mention them? (A) abc. (C) cba. 『著作權,翻印必究 9-15 (B) ba→c. (D) b→ c→a. 三美 mention提及

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