鍕捐偂瀹氱悊
1
銆佸凡鐭?/p>
a
锛?/p>
b
锛?/p>
c
涓衡柍
ABC
涓夎竟锛?/p>
a=6
锛?/p>
b=8
锛?/p>
b<c
锛屼笖
c
涓烘暣鏁帮紝鍒?/p>
c
=
2
銆?/p>
濡傚浘锛屾槸涓�涓笁绾у彴闃讹紝瀹冪殑姣忎竴绾х殑闀裤�佸銆侀珮鍒嗗埆涓?/p>
20dm
銆?/p>
3dm
銆?/p>
2dm
锛?/p>
鈥
鍜?/p>
B
鏄繖涓彴闃朵袱涓浉瀵圭殑绔偣锛?/p>
A
鐐规湁
涓�鍙殏铓侊紝
鎯冲埌
B
鐐瑰幓鍚冨彲鍙ｇ殑椋熺墿锛?/p>
鍒欒殏铓佹部鐫�鍙伴樁闈㈢埇鍒?/p>
B
鐐圭殑鏈�鐭矾绋嬫槸
_________
3
銆佹湁涓�鍦嗗舰娌圭綈搴曢潰鍦嗙殑鍛ㄩ暱涓?/p>
8m
锛?/p>
楂樹负
2m
锛?/p>
涓�鍙�侀紶浠?/p>
A
澶勭埇琛屽埌瀵硅
B
澶勫悆椋熺墿锛?/p>
瀹?/p>
鐖鐨勬渶鐭矾绾块暱涓哄灏戯紵
4
銆佷竴绉嶇洓
楗枡鐨勫渾鏌卞舰鏉紙濡傚浘锛?/p>
锛屾祴寰楀唴閮ㄥ簳闈㈢洿寰勪负
5
銕濓紝楂樹负
12
銕濓紝鍚?/p>
绠℃斁杩涙澂閲岋紝鏉彛澶栭潰闇?/p>
鍑?/p>
5
銕濓紝闂惛绠¤鍋氬闀匡紵
5
銆佹姌鍙犵煩褰?/p>
ABCD
鐨勪竴杈?/p>
AD,
鐐?/p>
D
钀藉湪
BC
杈逛笂鐨勭偣
F
澶?/p>
,
宸茬煡
AB=8CM,BC=10CM,
姹?/p>
EF
6
銆?/p>
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
姹?/p>
CD
鐨勯暱
.
3
2
20
B
A
B
A
A
B
C
D
E
F
8
6
绗?/p>
8
棰樺浘