绮惧績鏁寸悊
椤佃剼鍐呭
渚嬮
1
鏈変笁鐩掔彔瀛愶紝姣忕洅鐨勭彔瀛愮殑鏁伴噺浜掍笉鐩稿悓銆傚皬鐜嬩粠绗竴涓洅瀛愬唴鍙栧嚭璇ョ洅鐝犲瓙鏁伴噺鐨?/p>
3
1
锛屽張
浠庣浜屼釜鐩掑瓙鍐呭彇鍑鸿鐩掔彔瀛愭暟閲忕殑
4
1
锛屽啀浠庣涓変釜鐩掑瓙鍐呭彇鍑鸿鐩掔彔瀛愭暟閲?/p>
5
1
銆傛渶鍚庯紝杩欎笁涓洅
瀛愬唴鍓╀笅鐨勭彔瀛愮殑鏁伴噺閮界浉绛夈�?/p>
璇烽棶灏忕帇浠庤繖涓変釜鐩掑瓙鍐呮墍鍙栧嚭鐨勭彔瀛愭暟閲忎箣鎬诲拰鐨勬渶灏忓彲鑳界殑鍊?/p>
鏄粈涔堬紵
鍒嗘瀽渚濇嵁棰樻剰鏈?/p>
3
2
A=
4
3
B=
5
4
C,
鍒?/p>
A:B:C=18:16:15
渚嬮
2
鐢层�佷箼涓ゆ牎鍘熸湁鍥句功鐨勬瘮鏄?/p>
7
锛?/p>
5
锛屽鏋滅敳鏍＄粰涔欐牎
650
鏈紝鐢层�佷箼涓ゆ牎鐨勫浘涔︽湰鏁扮殑姣斿氨鏄?/p>
3
锛?/p>
4
锛屽師鏉ョ敳鏍″弸
鍥句功澶氬皯鏈紵
闅忓爞缁冧範
锛?/p>
1
锛夋湁涓�涓暱鏂逛綋锛岄暱鍜屽鐨勬瘮鏄?/p>
2
锛?/p>
1
锛屽涓庨珮鐨勬瘮鏄?/p>
3:2
銆傚凡鐭ヨ繖涓暱鏂逛綋鐨勫叏閮ㄦ１闀夸箣鍜屾槸
220cm
锛屾眰杩欎釜闀挎柟浣撶殑浣撶Н銆?/p>
锛?/p>
2
锛?/p>
灏忔槑鍜屽皬鏂瑰悇璧颁竴娈佃矾锛?/p>
灏忔槑璧扮殑璺▼姣斿皬鏂瑰
5
1
锛?/p>
灏忔柟鐢ㄧ殑鏃堕棿姣斿皬鏄庡
8
1
銆傚皬鏄庡拰灏忔柟鐨勯�熷害
涔嬫瘮鏄灏戯紵
锛?/p>
3
锛夌敳銆佷箼涓や粨搴撳瓨璐у惃鏁版瘮涓?/p>
4
锛?/p>
3
锛屽鏋滅敱鐢插簱涓彁鍙?/p>
8
鍚ㄦ斁鍒颁箼搴撲腑锛屽垯鐢层�佷箼涓や粨搴撳瓨璐у惃鏁版瘮涓?/p>
4
锛?/p>
5
銆備袱
浠撳簱鍘熷瓨璐ф�诲惃鏁版槸澶氬皯鍚紵
渚嬮
3
濡傚浘锛堣榛戞澘锛夛紝姝ｆ柟褰?/p>
ABCD
鐨勮竟
AB
涓庢鏂瑰舰
MNPQ
鐨勮竟
PQ
骞宠涓旂浉绛夈�傝瘯姹傞槾褰?/p>
閮ㄥ垎鐨勯潰绉笌姝ｆ柟褰?/p>
ABCD
鐨勯潰绉箣姣斻�?/p>
渚嬮
4
濡傚浘锛屼笁涓悓蹇冨渾锛屼粬浠殑鍗婂緞涔嬫瘮鏄?/p>
3
锛?/p>
4
锛?/p>
5
锛屽鏋滃ぇ鍦嗙殑闈㈢Н鏄?/p>
100
骞虫柟鍘樼背锛岄偅涔堜腑
鍦嗗拰
灏忓渾涔嬮棿鐨勫渾鐜潰绉槸澶氬皯锛?/p>
缁冧範
(1)
濡傚浘鍦ㄥ洓杈瑰舰
ABCD
涓紝
AC
鍜?/p>
BD
鐩镐氦浜?/p>
O
鐐广�備笁涓皬涓夎褰㈢殑闈㈢Н鍒嗗埆鏄?/p>
20
銆?/p>
16
銆?/p>
32
銆傞偅涔堥槾褰变笁瑙掑舰
BOC
鐨勯潰绉槸澶氬皯锛?/p>
A
B
OD
C
(2)
濡傚浘鎵�绀烘褰?/p>
ABCD
鐨勪笂搴?/p>
AD
闀?/p>
12
鍘樼背锛岄珮
BD
闀?/p>
18
鍘樼背锛?/p>
BE=2DE,
鍒欎笅搴?/p>
BC
闀垮灏戝帢绫筹紵
AD
BC
1
銆佸叚骞寸骇涓�鐝殑鐢枫�佸コ鐢熸瘮渚嬫槸
3
锛?/p>
2
锛屽張鏉ヤ簡
4
鍚嶅コ鐢熷悗锛屽叏鐝叡鏈?/p>
44
浜猴紝姹傜幇鍦ㄧ殑鐢枫�佸コ鐢?/p>
浜烘暟涔嬫瘮銆?/p>
2
銆佸笀寰掍簩浜哄叡鍔犲伐闆朵欢
400
涓紝
甯堝倕鍔犲伐涓�涓浂浠剁敤
9
鍒嗛挓锛?/p>
寰掑紵鍔犲伐涓�涓浂浠剁敤
15
鍒嗛挓銆?/p>
瀹屾垚
浠诲姟鏃讹紝甯堝倕姣斿緬寮熷鍔犲伐澶氬皯涓浂浠讹紵
3
銆佺敳銆佷箼涓や汉鐨勯挶鏁颁箣姣旀槸
3
锛?/p>
1
锛屽鏋滅敳缁欎箼
0.6
鍏冿紝鍒欎袱浜虹殑閽辨暟涔嬫瘮鍙樹负
2
锛?/p>
1.
涓や汉鍏辨湁澶氬皯
閽憋紵
4
銆佷竴鏉¤矾鍏ㄩ暱鏄?/p>
60
鍗冪背锛屽垎鎴愪笂鍧°�佸钩璺�佷笅鍧′笁娈碉紝鍚勬璺▼鐨勯暱搴︿箣姣旀槸
1
锛?/p>
2
锛?/p>
3
锛屾煇浜鸿蛋
鍚勬璺▼鎵�鐢ㄧ殑鏃堕棿涔嬫瘮鏄?/p>
3
锛?/p>
4
锛?/p>
5
銆?/p>
宸茬煡浠栬蛋骞宠矾鐨勯�熷害鏄?/p>
5
鍗冪背
/
鏃讹紝
浠栬蛋瀹屽叏绋嬬敤澶氬皯鏃堕棿锛?/p>