.
..
2017
骞村北涓滅渷鑱婂煄甯備腑鑰冩暟瀛﹁瘯鍗?/p>
涓�銆侀�夋嫨棰橈紙鏈ぇ棰樺叡
12
涓皬棰橈紝姣忓皬棰?/p>
3
鍒嗭紝鍏?/p>
36
鍒嗭級
1
锛?/p>
64
鐨勭珛鏂规牴鏄紙
锛?/p>
A
锛?/p>
4
B
锛?/p>
8
C
锛幝?/p>
4
D
锛幝?/p>
8
2
锛庡湪
Rt
鈻?/p>
ABC
涓紝
cosA=
锛岄偅涔?/p>
sinA
鐨勫�兼槸锛?/p>
锛?/p>
A
锛?
B
锛?
C
锛?
D
锛?/p>
3
锛庝笅鍒楄绠楅敊璇殑鏄紙
锛?/p>
A
锛?
=4
B
锛?/p>
3
2
脳
3
锕?/p>
1
=3
C
锛?/p>
2
0
梅
2
锕?/p>
2
=
D
锛?/p>
锛堬梗
3
脳
10
2
锛?/p>
3
=
锕?/p>
2.7
脳
10
7
4
锛庡鍥撅紝鈻?/p>
ABC
涓紝
DE
鈭?/p>
BC
锛?/p>
EF
鈭?/p>
AB
锛岃鍒ゅ畾鍥涜竟褰?/p>
DBFE
鏄彵褰紝杩橀渶瑕佹坊
鍔犵殑鏉′欢鏄紙
锛?/p>
A
锛?/p>
AB=AC
B
锛?/p>
AD=BD
C
锛?/p>
BE
鈯?/p>
AC
D
锛?/p>
BE
骞冲垎鈭?/p>
ABC
5
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鍩庡競
鎮夊凹
绾界害
鏃跺樊
/
鏃?/p>
+
2
锕?/p>
13
褰撳寳浜?/p>
6
鏈?/p>
15
鏃?/p>
23
鏃讹紝鎮夊凹銆佺航绾︾殑鏃堕棿鍒嗗埆鏄紙
锛?/p>
A
锛?/p>
6
鏈?/p>
16
鏃?/p>
1
鏃讹紱
6
鏈?/p>
15
鏃?/p>
10
鏃?/p>
B
锛?/p>
6
鏈?/p>
16
鏃?/p>
1
鏃讹紱
6
鏈?/p>
14
鏃?/p>
10
鏃?/p>
C
锛?/p>
6
鏈?/p>
15
鏃?/p>
21
鏃讹紱
6
鏈?/p>
15
鏃?/p>
10
鏃?/p>
D
锛?/p>
6
鏈?/p>
15
鏃?/p>
21
鏃讹紱
6
鏈?/p>
16
鏃?/p>
12
鏃?/p>
6
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