Question

如图,正四棱形的底面边长为5cm,侧棱长为8cm,一只蚂蚁欲从正四棱柱底面上的点A沿棱

Answer 1

(BB1+B1C1)²=AB²=（AC1）²
（BC1）²+AB²=（AC1）²
B²+5²=AC1²
AC=根号194

（AC+BC）²+A1A2=A1C2
AC²+A1A2=A1C2
10²+8²=A1C2
A1C2=根号164
=2根41
最后约为13厘米
A1C＜AC1

∴最短路径为13厘米

Answer 2

你好,很高兴能为你解答问题！图呢 解：(bb1 b1c1)￿=ab￿=（ac1）￿（bc1）￿ ab￿=（ac1）￿ b￿ 5￿=ac1￿ ac=根号194（ac bc）￿ a1a2=a1c2 ac￿ a1a2=a1c2 10￿ 8￿=a1c2 a1c2=根号164 =2根41 a1c＜ac1 ∴最短路径2根41 希望可以帮到你

Answer 3

(bb1+b1c1)�0�5=ab�0�5=（ac1）�0�5（bc1）�0�5+ab�0�5=（ac1）�0�5b�0�5+5�0�5=ac1�0�5ac=根号194 （ac+bc）�0�5+a1a2=a1c2ac�0�5+a1a2=a1c210�0�5+8�0�5=a1c2a1c2=根号164 =2根41a1c＜ac1∴最短路径2根41