鐏胯嫢瀵掓槦鍒朵綔
鐏胯嫢瀵掓槦鍒朵綔
G
F
E
D
B
A
C
澶栧浗璇鏍″垵浜屾暟瀛﹀绉戝瀛︽彁绾?/p>
濮撳悕锛?/p>
_______
鐝骇锛?/p>
________
璇鹃锛?/p>
2.4
绾挎銆佽鐨勮酱瀵圭О鎬э紙
1
锛?/p>
璁捐浜猴細寮犳案
瀹℃牳锛氬垵浜屾暟瀛﹀璇剧粍
璇惧墠鍙備笌
涓�銆?/p>
1
銆佽鐪熼槄璇昏鏈?/p>
P51-52
2
銆佺粡鍘嗘帰绱㈢嚎娈电殑杞村绉版�х殑杩囩▼锛岃繘涓�姝ヤ綋楠岃酱瀵圭О鐨勭壒寰侊紝鍙戝睍绌洪棿瑙傚康锛涙帰绱㈠苟
鎺屾彙绾挎鐨勫瀭鐩村钩鍒嗙嚎鐨勬�ц川锛?/p>
浜屻�佸瀛﹂
1
銆?/p>
锛?/p>
1
锛変换鎰忕敾涓�鏉＄嚎娈?/p>
AB
锛屾姌绾革紝浣夸袱涓鐐?/p>
A
涓?/p>
B
閲嶅悎銆備綘鍙戠幇鎶樼棔涓庣嚎娈垫湁浣曞叧绯伙紵
锛?/p>
2
锛夊湪鎶樼棔涓婁换鎰忓彇涓�鐐?/p>
P
锛岃繛鎺?/p>
PA
銆?/p>
PB
锛屽啀娌垮師鎶樼棔閲嶆柊鎶樺彔锛屾湁浠�涔堢粨璁猴紵
锛?/p>
3
锛夊凡鐭ワ細
MN
鈯?/p>
AB
锛屽瀭瓒充负鐐?/p>
C
锛?/p>
AC
锛?/p>
BC
锛岀偣
P
鏄洿绾?/p>
MN
涓婁换鎰忎竴鐐癸紟
姹傝瘉锛?/p>
PA
锛?/p>
PB
锛?/p>
锛?/p>
4
锛夋帰绌讹細绾挎鐨勫瀭鐩村钩鍒嗙嚎澶栫殑鐐癸紝鍒拌繖鏉＄嚎娈典袱绔殑璺濈鐩哥瓑鍚楋紵涓轰粈涔堬紵
濡傚浘锛屽湪绾挎
AB
鐨勫瀭鐩村钩鍒嗙嚎
l
澶栦换鍙栦竴鐐?/p>
P
锛岃繛鎺?/p>
PA
銆?/p>
PB
锛?/p>
PA
浜?/p>
l
浜庣偣
Q
锛?/p>
PA
涓?/p>
PB
鐩哥瓑鍚楋紵涓轰粈涔堬紵
鐢辨寰楀埌锛?/p>
2
銆佸皾璇曟帰绱?/p>
1
銆佸鍥撅紝鐩寸嚎
MN
琛ㄧず娌宠竟锛屼竴鐗ф皯鍦ㄧ偣
A
澶勬斁鐗э紝鐜板湪瑕佸埌娌宠竟鍘婚ギ姘达紝鐒跺悗鍥炲埌甯愮鐐?/p>
B
澶勶紝闂湪浣曞楗按锛屾墠鑳戒娇浠栨墍璧扮殑璺渶鐭紵鍦ㄥ浘涓綔鍑鸿〃绀洪ギ姘村鐨?/p>
C
鐐广�?/p>
路
B
A
路
M N
2
銆佸鍥撅紝鈻?/p>
ABC
涓紝
AB
鐨勫瀭鐩村钩鍒嗙嚎鍒嗗埆浜?/p>
AB
銆?/p>
BC
浜庣偣
D
銆?/p>
E
锛?/p>
AC
鐨勫瀭鐩村钩鍒嗙嚎鍒嗗埆浜?/p>
AC
銆?/p>
BC
浜庣偣
F
銆?/p>
G
锛岃嫢
BC
=25
cm
锛屾眰鈻?/p>
AEG
鐨勫懆闀匡紵