鍕捐偂瀹氱悊璇炬椂缁冿紙
1
锛?/p>
1.
鍦ㄧ洿瑙掍笁瑙掑舰
ABC
涓紝鏂滆竟
AB=1
锛屽垯
AB
2
2
2
AC
BC
飥?/p>
飥?/p>
鐨勫�兼槸锛?/p>
锛?/p>
A.2
B.4
C.6
D.8
2.
鏈変竴涓舰鐘朵负鐩磋姊舰鐨勯浂浠?/p>
ABCD
锛?/p>
AD
鈭?/p>
BC
锛屾枩鑵?/p>
DC
鐨勯暱涓?/p>
10
cm
锛屸垹
D=120掳
锛屽垯璇ラ浂浠跺彟涓�鑵?/p>
AB
鐨勯暱鏄?/p>
______ cm
锛堢粨鏋滀笉鍙栬繎浼煎�硷級
.
3.
鐩磋涓夎褰袱鐩磋杈归暱鍒嗗埆涓?/p>
5
鍜?/p>
12
锛屽垯瀹冩枩杈逛笂鐨勯珮涓?/p>
_______
锛?/p>
4.
涓�鏍规棗鏉嗕簬绂诲湴闈?/p>
12
m
澶勬柇瑁傦紝鐘瑰瑁呮湁閾伴摼閭ｆ牱鍊掑悜鍦伴潰锛屾棗鏉嗛《钀戒簬绂绘棗鏉嗗湴姝?/p>
16
m
锛屾棗鏉嗗湪鏂?/p>
瑁備箣鍓嶉珮澶氬皯
m
锛?/p>
5.
濡傚浘锛屽涓嬪浘锛屼粖骞寸殑鍐伴洩鐏惧涓紝涓�妫靛ぇ鏍戝湪绂诲湴闈?/p>
3
绫冲鎶樻柇锛屾爲鐨勯《绔惤鍦ㄧ鏍戞潌搴曢儴
4
绫冲锛?/p>
閭ｄ箞杩欐５鏍戞姌鏂箣鍓嶇殑楂樺害鏄?/p>
绫?/p>
6.
椋炴満鍦ㄧ┖涓按骞抽琛?/p>
,
鏌愪竴鏃跺埢鍒氬ソ椋炲埌涓�涓敺瀛╁瓙澶撮《姝ｄ笂鏂?/p>
4000
绫冲
,
杩囦簡
20
绉?/p>
,
椋炴満璺濈杩欎釜鐢?/p>
瀛╁ご椤?/p>
5000
绫?/p>
,
姹傞鏈烘瘡灏忔椂椋炶澶氬皯鍗冪背
?
7.
濡傚浘鎵�绀猴紝鏃犵洊鐜荤拑瀹瑰櫒锛岄珮
18
cm
锛屽簳闈㈠懆闀夸负
60
cm
锛屽湪澶栦晶璺濅笅搴?/p>
1
cm
鐨勭偣
C
澶勬湁涓�铚樿洓锛屼笌
铚樿洓鐩稿鐨勫鍣ㄧ殑涓婂彛澶栦晶璺濆紑鍙?/p>
1
cm
鐨?/p>
F
澶勬湁涓�鑻嶈潎锛岃瘯姹傛�ヤ簬鎵戣揣鑻嶈潎鍏呴ゥ鐨勮湗铔涳紝鎵�璧扮殑鏈�鐭矾
绾跨殑闀垮害
.
8.
涓�涓浂浠剁殑褰㈢姸濡傚浘鎵�绀猴紝宸茬煡
AC=3
cm
锛?/p>
AB=4
cm
锛?/p>
BD=12
cm
銆傛眰
CD
鐨勯暱
.
绗?/p>
5
棰樺浘
绗?/p>
7
棰樺浘
绗?/p>
8
棰樺浘