绗?/p>
1
椤碉紙鍏?/p>
124
椤碉級
绮鹃�夊渾鐩稿叧鍘嬭酱棰樺弬鑰冪瓟妗堜笌璇曢瑙ｆ瀽
1
锛庡鍥撅紝
AB
鏄姍
O
鐨勭洿寰勶紝鐐?/p>
C
鏄姍
O
涓婁竴鐐癸紝
AD
涓庤繃鐐?/p>
C
鐨勫垏绾垮瀭鐩达紝鍨?/p>
瓒充负鐐?/p>
D
锛岀洿绾?/p>
DC
涓?/p>
AB
鐨勫欢闀跨嚎鐩镐氦浜庣偣
P
锛屽鸡
CE
骞冲垎鈭?/p>
ACB
锛屼氦
AB
鐐?/p>
F
锛?/p>
杩炴帴
BE
锛?/p>
锛?/p>
1
锛夋眰璇侊細
AC
骞冲垎鈭?/p>
DAB
锛?/p>
锛?/p>
2
锛夋眰璇侊細
PC=PF
锛?/p>
锛?/p>
3
锛夎嫢
tan
鈭?/p>
ABC=
锛?/p>
AB=14
锛屾眰绾挎
PC
鐨勯暱锛?/p>
銆愯�冪偣銆?/p>
MR
锛氬渾鐨勭患鍚堥锛?/p>
銆愬垎鏋愩�?/p>
锛?/p>
1
锛夌敱
PD
鍒団姍
O
浜庣偣
C
锛?/p>
AD
涓庤繃鐐?/p>
C
鐨勫垏绾垮瀭鐩达紝鏄撹瘉寰?/p>
OC
鈭?/p>
AD
锛?/p>
缁ц�岃瘉寰?/p>
AC
骞冲垎鈭?/p>
DAB
锛?/p>
锛?/p>
2
锛夌敱鏉′欢鍙緱鈭?/p>
BCP=
鈭?/p>
CAB
锛屸垹
BCF=
鈭?/p>
ACF
锛岀粨鍚堝瑙掓�ц川鍙緱鈭?/p>
PCF=
鈭?/p>
PFC
锛?/p>
鍗冲彲璇佸緱
PC=PF
锛?/p>
锛?/p>
3
锛夋槗璇佲柍
PAC
鈭解柍
PCB
锛岀敱鐩镐技涓夎褰㈢殑鎬ц川鍙緱鍒?/p>
锛屽張鍥犱负
tan
鈭?
ABC=
锛屾墍浠ュ彲寰?
锛岃繘鑰屽彲寰楀埌
锛岃
PC=4k
锛?/p>
PB=3k
锛屽垯鍦?/p>
Rt
鈻?/p>
POC
涓紝鍒╃敤鍕捐偂瀹氱悊鍙緱
PC
2
+
OC
2
=OP
2
锛岃繘鑰屽彲寤虹珛鍏充簬
k
鐨勬柟绋嬶紝瑙ｆ柟绋嬫眰鍑?/p>
k
鐨勫�煎嵆鍙眰鍑?/p>
PC
鐨勯暱锛?/p>
銆愯В绛斻�?/p>
锛?/p>
1
锛夎瘉鏄庯細鈭?/p>
PD
鍒団姍
O
浜庣偣
C
锛?/p>
鈭?/p>
OC
鈯?/p>
PD
锛?/p>
鍙堚埖
AD
鈯?/p>
PD
锛?/p>
鈭?/p>
OC
鈭?/p>
AD
锛?/p>
鈭粹垹
ACO=
鈭?/p>
DAC
锛?/p>
鈭?/p>
OC=OA
锛?/p>