鏈�鏂颁紭绉�鐨勬暀鑲?/p>
word
鏂囨。
鍥?
A
B
C
E
D
浜烘暀鍏勾绾ф暟瀛︿笂鍐屽悓姝ョ粌涔犻鍙婄瓟妗?/p>
绗崄涓�绔?/p>
鍏ㄧ瓑涓夎褰?/p>
11.1
鍏ㄧ瓑涓夎褰?/p>
1
銆?/p>
宸茬煡鈯?/p>
ABC
鈮屸娍
DEF
锛?/p>
A
涓?/p>
D
锛?/p>
B
涓?/p>
E
鍒嗗埆鏄搴旈《鐐癸紝鈭?/p>
A=52
掳锛屸垹
B=67
掳锛?/p>
BC =15cm
锛?/p>
鍒?/p>
F
飪?/p>
=
锛?/p>
FE = .
2
銆佲埖鈻?/p>
ABC
鈮屸柍
DEF
鈭?/p>
AB=
锛?/p>
AC= BC=
锛?/p>
锛堝叏绛変笁瑙掑舰鐨勫搴旇竟
锛?/p>
鈭?/p>
A=
锛屸垹
B=
锛屸垹
C=
锛?/p>
锛堝叏绛変笁瑙掑舰鐨勫搴旇竟
锛?/p>
3
銆佷笅鍒楄娉曟纭殑鏄紙
锛?/p>
A
锛氬叏绛変笁瑙掑舰鏄寚褰㈢姸鐩稿悓鐨勪袱涓笁瑙掑舰
B
锛氬叏绛変笁瑙掑舰鐨勫懆闀垮拰闈㈢Н鍒嗗埆鐩哥瓑
C
锛氬叏绛変笁瑙掑舰鏄寚闈㈢Н鐩哥瓑鐨勪袱涓笁瑙掑舰
D
锛氭墍鏈夌殑绛夎竟涓夎褰㈤兘鏄叏绛変笁瑙掑舰
4
銆?/p>
濡傚浘
1
锛?/p>
螖
ABE
鈮?/p>
螖
ACD
锛?/p>
AB=8cm
锛?/p>
AD=5cm
锛屸垹
A=60
掳锛屸垹
B=40
掳锛屽垯
AE=_____
锛屸垹
C=____
銆?/p>