鍏勾绾ф暟瀛︿笅鍐屻�婂浘褰笌璇佹槑銆嬫祴璇曞嵎
瀛︽牎锛?/p>
__________
濮撳悕锛?/p>
__________
鐝骇锛?/p>
__________
鑰冨彿锛?/p>
__________
棰樺彿
涓�
浜?/p>
涓?/p>
鎬诲垎
寰楀垎
璇勫嵎浜?/p>
寰楀垎
涓�銆侀�夋嫨棰?/p>
1
锛?/p>
(2
鍒?/p>
)
涓嬪垪璇彞涓紝涓嶆槸鍛介鐨勬槸锛?/p>
锛?/p>
A
锛庤嫢
a
锛?/p>
c
锛?/p>
b
锛?/p>
c
锛屽垯
a
锛?/p>
b
B
锛庡悓瑙掔殑浣欒鐩哥瓑
C
锛庝綔绾挎
AB
鐨勫瀭鐩村钩鍒嗙嚎
D
锛庝袱鐩寸嚎鐩镐氦锛屽彧鏈変竴涓叕鍏辩偣
2
锛?/p>
(2
鍒?/p>
)
濡傚浘锛?/p>
Rt
鈻?/p>
ABC
涓紝
CD
鏄枩杈?/p>
AB
涓婄殑楂橈紝瑙掑钩鍒嗙嚎
AE
浜?/p>
CD
浜?/p>
H
锛?/p>
EF
鈯?/p>
AB
浜?/p>
F
锛屽垯涓?/p>
鍒楃粨璁轰腑涓嶆纭殑鏄紙
锛?/p>
A
锛庘垹
ACD=
鈭?/p>
B B
锛?/p>
CH=CE=EF C
锛?/p>
AC=AF D
锛?/p>
CH=HD
3
锛?/p>
(2
鍒?/p>
)
璇佹槑涓嬪垪缁撹涓嶈兘杩愮敤鍏悊
鈥?/p>
鍚屼綅瑙掔浉绛夛紝涓ょ洿绾垮钩琛?/p>
鈥?/p>
鐨勬槸
锛?/p>
锛?/p>
A
锛庡悓鏃佸唴瑙掍簰琛ワ紝涓ょ洿绾垮钩琛?/p>
B
锛庡唴閿欒鐩哥瓑锛屼袱鐩寸嚎骞宠
C
锛庡椤惰鐩哥瓑
D
锛庡钩琛屼簬鍚屼竴鐩寸嚎鐨勪袱鏉＄洿绾垮钩琛?/p>
4
锛?/p>
(2
鍒?/p>
)
濡傚浘鎵�绀猴紝
PQ
鏄繃
A
鐐圭殑鐩寸嚎锛屽鏋?/p>
PQ
鈭?/p>
BC
锛岄偅涔堟湁锛?/p>
锛?/p>
A
锛庘垹
ACB=
鈭?/p>
BAP
B
锛庘垹
ABC=
鈭?/p>
QAC
C
锛庘垹
ABC=
鈭?/p>
PAB
D
锛庘垹
PAB=
鈭?/p>
QAC
5
锛?/p>
(2
鍒?/p>
)
涓嬮潰璇彞涓紝鍛介鐨勪釜鏁版槸锛?/p>
锛?/p>
锛?/p>
1
锛夊悓瑙掔殑琛ヨ鐩哥瓑锛?/p>
锛?/p>
2
锛変袱鏉＄洿绾跨浉浜わ紝鏈夊嚑涓氦鐐?/p>
?
锛?/p>
3
锛夌浉绛夌殑涓や釜瑙掓槸瀵归《瑙掞紟
锛?/p>
4
锛夎嫢
a>0
锛?/p>
b>0
锛屽垯
ab>0
锛?/p>