If a 3D Rectangle with a base of 10 in for the long side and 5 in for the short site and the height of 6 in...
S=2(50) + 30(6)= 280 in 2.
How do i get the perimeter of a prism?
I thought you add up all the sides, but i get 84.
THe correct answer is supposidly 30
2006-07-26 03:17:19 · 2 answers · asked by mrxxbrian 2 in Education & Reference ➔ Homework Help
Solution.
With 3d shapes you have perimeter,area and volume.
Your 84 is probably area.
The permieter is found by taking 2*(Base)+ 2*(Shortside)
So...
2*10+2*5 = 30 in (not in^2)
30 is the shortest distance around the prism.
2006-07-26 03:26:05 · answer #1 · answered by Engineer Adam 2 · 2⤊ 0⤋
perimeter of the prism is the perimeter of the cross section which is a rectangle and so it is 2(l+b)=2(10+5)=30 in.
area of cross section is l*b=10*5=50 in^2
the total surface areawill be 2(lb+lh+bh)=2(50+60+30)=280in^2
volume=area of cross section *height=50*6=300in^3
2006-07-27 01:08:03 · answer #2 · answered by rumradrek 2 · 0⤊ 0⤋