1
瀛︾敓鍋氶鍓嶈鍏堝洖绛斾互涓嬮棶棰?/p>
闂
1
锛?/p>
浠庤竟涓庤鐨勮搴︽潵鑰冭檻鐩磋涓夎褰㈢殑鎬ц川閮芥湁鍝簺锛?/p>
闂
2
锛?/p>
閬囧埌鏂滆竟涓婄殑涓偣鎬庝箞鎯筹紵
闂
3
锛?/p>
鐩磋涓夎褰㈡枩杈逛笂鐨勪腑绾跨瓑浜?/p>
__________
锛?/p>
濡傛灉涓�涓笁瑙掑舰
__________________
锛岄偅涔堣繖涓笁瑙掑舰鏄洿瑙掍笁瑙掑舰锛?/p>
鐩磋涓夎褰㈡�ц川搴旂敤锛堢洿瑙?/p>
+
涓偣锛?/p>
涓�銆佸崟閫夐
(
鍏?/p>
7
閬擄紝姣忛亾
12
鍒?/p>
)
1.
濡傚浘锛屽湪
鈻?/p>
ABC
涓紝鈭?/p>
BAC=90掳
锛屾枩杈?/p>
BC
涓婄殑楂?/p>
AD=5cm
锛屾枩杈?/p>
BC
涓婄殑涓嚎
AE=8cm
锛岄偅
涔?/p>
鈻?/p>
ABC
鐨勯潰绉负
(
)
A.
B.
C.
D.
绛旀锛?/p>
C
瑙ｉ鎬濊矾锛?/p>
璇曢闅惧害锛?/p>
涓夐鏄?/p>
鐭ヨ瘑鐐癸細
鐩磋涓夎褰㈡枩杈逛腑绾跨瓑浜庢枩杈逛竴鍗?/p>
2.
濡傚浘锛屽湪
Rt
鈻?/p>
ABC
涓紝
CD
鏄枩杈?/p>
AB
涓婄殑涓嚎锛?/p>
EF
杩囩偣
C
涓斿钩琛屼簬
AB
锛?/p>
鑻モ垹
BCF=35掳
锛屽垯鈭?/p>
ACD
鐨勫害鏁版槸
(
)