1
鐩镐氦绾夸笌骞宠绾挎祴璇曢
涓�銆佸～绌洪
1.
涓�涓鐨勪綑瑙掓槸
30潞
锛屽垯杩欎釜瑙掔殑琛ヨ鏄?/p>
.
2.
涓�涓涓庡畠鐨勮ˉ瑙掍箣宸槸
20潞
锛屽垯杩欎釜瑙掔殑澶у皬鏄?/p>
.
3.
鏃堕挓鎸囧悜
3
鏃?/p>
30
鍒嗘椂锛岃繖鏃舵椂閽堜笌鍒嗛拡鎵�鎴愮殑閿愯鏄?/p>
.
4.
濡傚浘
鈶?/p>
锛?/p>
鈭?/p>
1 = 82潞
锛?/p>
鈭?/p>
2 = 98潞
锛?/p>
鈭?/p>
3 = 80潞
锛屽垯
鈭?/p>
4 =
搴?/p>
.
5.
濡傚浘
鈶?/p>
锛岀洿绾?/p>
AB
锛?/p>
CD
锛?/p>
EF
鐩镐氦浜庣偣
O
锛?/p>
AB
鈯?/p>
CD
锛?/p>
OG
骞冲垎
鈭?/p>
AOE
锛?/p>
鈭?/p>
FOD = 28潞
锛?/p>
鍒?/p>
鈭?/p>
BOE =
搴︼紝
鈭?/p>
AOG =
搴?/p>
.
6.
濡傚浘
鈶?/p>
锛?/p>
AB
鈭?/p>
CD
锛?/p>
鈭?/p>
BAE = 120潞
锛?/p>
鈭?/p>
DCE = 30潞
锛屽垯
鈭?/p>
AEC =
搴?/p>
.
7.
鎶婁竴寮犻暱鏂瑰舰绾告潯鎸夊浘
鈶?/p>
涓紝
閭ｆ牱鎶樺彔鍚庯紝
鑻ュ緱鍒?/p>
鈭?/p>
AOB鈥? 70潞
锛?/p>
鍒?/p>
鈭?/p>
OGC =
.
8.
濡傚浘
鈶?/p>
锛屾鏂瑰舰
ABCD
涓紝
M
鍦?/p>
DC
涓婏紝涓?/p>
BM = 10
锛?/p>
N
鏄?/p>
AC
涓婁竴鍔ㄧ偣锛屽垯
DN + MN
鐨勬渶灏忓�间负
.
9.
濡傚浘鎵�绀猴紝
褰撳崐寰勪负
30cm
鐨勮浆鍔ㄨ疆杞繃鐨勮搴︿负
120
飩?/p>
鏃讹紝
鍒欎紶閫佸甫涓婄殑鐗╀綋
A
骞崇Щ鐨?/p>
璺濈涓?/p>
cm
銆?/p>
10.
濡傚浘鎵�绀猴紝鍦ㄥ洓杈瑰舰
ABCD
涓紝
AD
鈭?/p>
BC
锛?/p>
BC
锛?/p>
AD
锛?/p>
鈭?/p>
B
涓?/p>
鈭?/p>
C
浜掍綑锛屽皢
AB
锛?/p>
CD
鍒?
鍒钩绉诲埌鍥句腑
EF
鍜?/p>
EG
鐨勪綅缃紝
鍒?/p>
鈻?/p>
EFG
涓?/p>
涓夎褰紝
鑻?/p>
AD=2cm
锛?/p>
BC=8cm
锛?/p>
鍒?/p>
FG =
銆?/p>
11.
濡傚浘
9
锛屽鏋?/p>
鈭?/p>
1=40掳
锛?/p>
鈭?/p>
2=100掳
锛岄偅涔?/p>
鈭?/p>
3
鐨勫悓浣嶈绛変簬
锛?/p>
鈭?/p>
3
鐨勫唴閿欒绛?
浜?/p>
锛?/p>
鈭?/p>
3
鐨勫悓鏃佸唴瑙掔瓑浜?/p>
锛?/p>
12.
濡傚浘
10
锛?/p>
鍦?/p>
鈻?/p>
ABC
涓紝
宸茬煡
鈭?/p>
C
=90掳
锛?/p>
AC
锛?/p>
60 cm
锛?/p>
AB
=100 cm
锛?/p>
a
銆?/p>
b
銆?/p>
c
鈥?/p>
鏄湪
鈻?/p>
ABC
鍐呴儴鐨勭煩褰紝瀹冧滑鐨勪竴涓《鐐瑰湪
AB
涓婏紝涓�缁勫杈瑰垎鍒湪
AC
涓婃垨涓?/p>
AC
骞宠锛屽彟涓�缁?/p>
瀵硅竟鍒嗗埆鍦?/p>
BC
涓婃垨涓?/p>
BC
骞宠
.
鑻ュ悇鐭╁舰鍦?/p>
AC
涓婄殑杈归暱鐩哥瓑锛?/p>
鐭╁舰
a
鐨勪竴杈归暱鏄?/p>
72
cm
锛屽垯杩欐牱鐨勭煩褰?/p>
a
銆?/p>
b
銆?/p>
c
鈥?/p>
鐨勪釜鏁版槸
_
锛?/p>
E
A
B
C
D
G
F