1
涓撻
3
锛氭埅闀胯ˉ鐭硶
銆愬吀渚嬪紩棰嗐�?/p>
渚嬮锛氾紙
2013
榛戦緳姹熼緳涓滃湴鍖猴級姝ｆ柟褰?/p>
ABCD
鐨勯《鐐?/p>
A
鍦ㄧ洿绾?/p>
MN
涓婏紝鐐?/p>
O
鏄瑙掔嚎
AC
銆?/p>
BD
鐨勪氦鐐癸紝
杩囩偣
O
浣?/p>
OE
鈯?/p>
MN
浜庣偣
E
锛岃繃鐐?/p>
B
浣?/p>
BF
鈯?/p>
MN
浜庣偣
F
銆?/p>
锛?/p>
1
锛夊鍥?/p>
1
锛岀偣
O
銆?/p>
B
涓ょ偣鍧囧湪鐩寸嚎
MN
涓婃柟鏃讹紝鏄撹瘉锛?/p>
AF+BF=2OE
锛堜笉闇�璇佹槑锛?/p>
锛?/p>
2
锛?/p>
褰撴鏂瑰舰
ABCD
缁曠偣
A
椤烘椂閽堟棆杞嚦鍥?/p>
2
銆?/p>
鍥?/p>
3
鐨勪綅缃椂锛?/p>
绾挎
AF
銆?/p>
BF
銆?/p>
OE
涔嬮棿鍙堟湁鎬庢牱鐨勫叧绯伙紵
璇风洿鎺ュ啓鍑轰綘鐨勭寽鎯筹紝骞堕�夋嫨涓�绉嶆儏鍐电粰浜堣瘉鏄庛�?/p>
銆愮瓟妗堛�戝浘
2
缁撹锛?/p>
AF
锕?/p>
BF=2OE
锛屽浘
3
缁撹锛?/p>
BF
-
AF=2OE
銆愬垎鏋愩�?/p>
锛?/p>
1
锛?/p>
杩囩偣
B
浣?/p>
BG
鈯?/p>
OE
浜?/p>
G
锛?/p>
鍙緱鍥涜竟褰?/p>
BGEF
鏄煩褰紝
鏍规嵁鐭╁舰鐨勫杈圭浉绛夊彲寰?/p>
EF=BG
锛?/p>
BF=GE
锛?/p>
鏍规嵁姝ｆ柟褰㈢殑瀵硅绾跨浉绛変笖浜掔浉鍨傜洿骞冲垎鍙緱
OA=OB
锛屸垹
AOB=90掳
锛屽啀鏍规嵁鍚岃鐨勪綑瑙掔浉绛夋眰鍑衡垹
AOE=
鈭?/p>
OBG
锛?/p>
鐒跺悗鍒╃敤
鈥?/p>
瑙掕杈?/p>
鈥?/p>
璇佹槑
鈻?/p>
AOE
鍜?/p>
鈻?/p>
OBG
鍏ㄧ瓑锛?/p>
鏍规嵁鍏ㄧ瓑涓夎褰㈠搴旇竟鐩哥瓑鍙緱
OG=AE
锛?/p>
OE=BG
锛?/p>
鍐嶆牴鎹?/p>
AF
锕?/p>
EF=AE
锛屾暣鐞嗗嵆鍙緱璇侊紱
锛?/p>
2
锛夐�夋嫨鍥?/p>
2
锛岃繃鐐?/p>
B
浣?/p>
BG
鈯?/p>
OE
浜?/p>
OE
鐨勫欢闀跨嚎浜?/p>
G
锛屽彲寰楀洓杈瑰舰
BGEF
鏄煩褰紝鏍规嵁鐭╁舰鐨勫杈圭浉绛夊彲寰?/p>
EF=BG
锛?/p>
BF=GE
锛屾牴鎹鏂瑰舰鐨勫瑙掔嚎鐩哥瓑涓斾簰鐩稿瀭鐩村钩鍒嗗彲寰?/p>
OA=OB
锛?/p>
鈭?/p>
AOB=90掳
锛?/p>
鍐嶆牴鎹悓瑙掔殑浣欒鐩哥瓑姹傚嚭鈭?/p>
AOE=
鈭?/p>
OBG
锛?/p>
鐒跺悗鍒╃敤
鈥?/p>
瑙掕杈?/p>
鈥?/p>
璇佹槑
鈻?/p>
AOE
鍜?/p>
鈻?/p>
OBG
鍏ㄧ瓑锛屾牴鎹叏绛変笁瑙掑舰瀵瑰簲杈圭浉绛夊彲寰?/p>
OG=AE
锛?/p>
OE=BG
锛屽啀鏍规嵁
AF
锕?/p>
EF=AE
锛屾暣鐞嗗嵆鍙緱璇侊紱閫夋嫨鍥?/p>
3
鍚岀悊鍙瘉锛?/p>
銆愯В绛斻�戯紙
1
锛夎瘉鏄庯細濡傚浘锛?/p>
杩囩偣
B
浣?/p>
BG
鈯?/p>
OE
浜?/p>
G
锛?/p>