鍥涜竟褰㈢患鍚堢粡鍏搁毦棰?/p>
1
锛庡凡鐭ワ細鍦ㄧ煩褰?/p>
ABCD
涓紝
AE
飦?/p>
BD
浜?/p>
E
锛?/p>
鈭?/p>
DAE=3
鈭?/p>
BAE
锛屾眰锛氣垹
EAC
鐨勫害鏁般�?/p>
2
锛庡凡鐭ワ細鐩磋姊舰
ABCD
涓紝
BC=CD=a
涓斺垹
BCD=60
飩?/p>
锛?/p>
E
銆?/p>
F
鍒嗗埆涓烘褰㈢殑鑵?/p>
AB
銆?/p>
DC
鐨勪腑鐐癸紝姹傦細
EF
鐨勯暱銆?/p>
3
銆佸凡鐭ワ細鍦ㄧ瓑鑵版褰?/p>
ABCD
涓紝
AB
鈭?/p>
DC
锛?/p>
AD=BC
锛?/p>
E
銆?/p>
F
鍒嗗埆涓?/p>
AD
銆?/p>
BC
鐨勪腑鐐癸紝
BD
骞冲垎鈭?/p>
ABC
浜?/p>
EF
浜?/p>
G
锛?/p>
EG=18
锛?/p>
GF=10
姹傦細绛夎叞姊舰
ABCD
鐨勫懆闀裤�?/p>
4
銆佸凡鐭ワ細姊舰
ABCD
涓紝
AB
鈭?/p>
CD
锛屼互
AD
锛?/p>
AC
涓洪偦杈逛綔骞宠鍥涜竟褰?/p>
ACED
锛?/p>
DC
寤堕暱绾?/p>
浜?/p>
BE
浜?/p>
F
锛屾眰璇侊細
F
鏄?/p>
BE
鐨勪腑鐐广�?/p>
5
銆?/p>
宸茬煡锛?/p>
姊舰
ABCD
涓紝
AB
鈭?/p>
CD
锛?/p>
AC
飦?/p>
CB
锛?/p>
AC
骞冲垎鈭?/p>
A
锛?/p>
鍙堚垹
B=60
飩?/p>
锛?/p>
姊舰鐨勫懆闀挎槸
20cm,
姹傦細
AB
鐨勯暱銆?/p>
6
銆佷粠骞宠鍥涜竟褰㈠洓杈瑰舰
ABCD
鐨勫悇椤剁偣浣滃瑙掔嚎鐨勫瀭绾?/p>
AE
銆?
BF
銆?/p>
CG
銆?/p>
DH
锛屽瀭瓒冲垎鍒槸
E
銆?/p>
F
銆?/p>
G
銆?/p>
H
锛屾眰璇侊細
EF
鈭?/p>
GH
銆?/p>
7
銆佸凡鐭ワ細姊舰
ABCD
鐨勫瑙掔嚎鐨勪氦鐐逛负
E
鑻ュ湪骞宠杈圭殑涓�杈?/p>
BC
鐨勫欢闀跨嚎涓婂彇涓�鐐?/p>
F
锛屼娇
S
ABC
飦?/p>
=S
EBF
飦?/p>
锛屾眰璇侊細
DF
鈭?/p>
AC
銆?/p>
_
O
_
A
_
B
_
D
_
C
_
E
_
E
_
F
_
A
_
B
_
D
_
C
_
G
_
A
_
B
_
D
_
C
_
E
_
F
_
D
_
A
_
B
_
C
_
E
_
F
_
A
_
B
_
D
_
C
_
O
_
D
_
A
_
B
_
C
_
H
_
F
_
G
_
E
_
E
_
A
_
B
_
F
_
D
_
C
_
C
_
D
_
A
_
B
_
G
_
E
_
F
_
H