鐝骇
濮撳悕
瀛﹀彿
鍒嗘暟
锛堟祴璇曟椂闂达細
120
鍒嗛挓
婊″垎锛?/p>
120
鍒嗭級
涓�
.
閫夋嫨棰橈紙鍏?/p>
10
灏忛锛屾瘡棰?/p>
3
鍒嗭紝鍏?/p>
30
鍒嗭級
1
锛庝笅鍒楀浘褰腑锛屾棦鏄酱瀵圭О鍥惧舰鍙堟槸涓績瀵圭О鍥惧舰鐨勬槸锛?/p>
锛?/p>
銆愮瓟妗堛�?/p>
B
锛?/p>
鑰冪偣锛?/p>
1.
杞村绉板浘褰紱
2.
涓績瀵圭О鍥惧舰
.
2
锛庡鍥撅紝灏?/p>
Rt
鈻?/p>
ABC
锛堝叾涓垹
B=35
掳锛屸垹
C=90
掳锛夌粫鐐?/p>
A
鎸夐『鏃堕拡鏂瑰悜鏃嬭浆鍒扳柍
AB
1
C
1
鐨勪綅缃紝浣垮緱鐐?/p>
C
銆?/p>
A
銆?/p>
B
1
鍦ㄥ悓涓�鏉＄洿绾夸笂锛岄偅涔堟棆杞绛変簬
( )
A.55
掳
B.70
掳
C.125
掳
D.145
掳
銆愮瓟妗堛�?/p>
C
銆愯В鏋愩�?/p>
璇曢鍒嗘瀽锛氭牴鎹浘褰㈠彲寰楁棆杞殑瑙掑害涓衡垹
BA
1
B
锛屾牴鎹瑙掔殑鎬ц川鍙緱锛氣垹
BA
1
B
=90
掳
+35
掳
=125
掳
.
鏁呴�?/p>
C.
鑰冪偣锛氭棆杞殑鎬ц川
.
3
锛庡凡鐭ュ渾閿ョ殑搴曢潰鍗婂緞涓?/p>
3cm
锛屾瘝绾块暱涓?/p>
5cm
锛屽垯瀹冪殑渚ч潰绉负锛?/p>
锛?/p>
A.60
蟺
2
cm
B.45
蟺
2
cm
C.30
蟺
2
cm
D.15
蟺
2
cm
A
锛?/p>
B
锛?/p>
C
锛?/p>
D
锛?/p>