why is it that the "MANHOLE COVERS" is designed in round shape and not square or rectangle?
358151
simple, because it can never fall in,no matter how you move it
216589
It allows space for you to get the pizza out of the box without tearing said box up. Also, it would be nearly impossible to fold a circular box...The box would have to be two pieces, like a hat box, and that would make it more likely to come open when you don't want it to, or to let out heat so the pizza gets cold quicker. All this, not to mention that the square boxes are just easier and cheaper to make.
1049438
there are different shapes of plates and they are called customized.\nbut in commercial point of view. It would be cheaper to make round plates that customized. you see if you'll gonna make a moulder, it would be easier, faster and cheaper to make round moulders that square ones. \nso if you are a business man, why would you make customized plates if you can earn more profit in conventional plates.
255850
I assume the shape to be rectangle.\n\nMeasure the longer side in feets and name it L\nand the shorter side as B\n\nThen multiply L*B you get measure in square feets.\n\nIf it is irregular in shape, you have to cut it into parts and draw lines and measure each area separately.
1072387
Its a bit rounder. The panels on the Teamgeist ball makes it the roundest ball ever produced
652995
Check Nepal flag. It isn't even rectangular!
943945
Round seems to be our perception of the future, and of higher technology.  Look ar all our movies, the cars are always rounder than those of today.  WE think aliens are futuristic, so I guess that means they should be round.
605515
It is not exactly round, just looks that way.\n\nSee webpage below for the correct shape.
350009
I believe its oval. It would look like a box if it was square..No?
241234
Curtain drill pieces are circular in shape. They come in all sizes. i have used them in the past for all sorts of things, even on walls, bricks, and plasterboard. I have used them on firm foam for stage design. \n   I hope this works for you.
997212
so the cover wont fall in the hole.  a round cover cant fit through the hole no matter which way it is turned.
1797
The first few questions were right  ..BUT the origonal real reason is  Back during WW2 the Union Tank Car Co. of Indiana Stopped making rail tank cars and started making turrets for tanks. All of the reject metal which was the holes cut out for the top of the tanks were saved because ou the cost of metal;. Now being the government CHEEP they saved the round cuts of metal. Some smart engineer seeing the giant mountian of metal discs said   ahh Man hole covers
272850
it sounds like you are trying to find out about pipe connections or tubing?if this is so .you can obtain a pipefitters bluebook and it will give you all infomation on tubing and pipe and take offs and math to figure problems of different types with round pipe or tubing?i hope thats close for you.you can go to a libary and see drawings of local buildings and there are detailed.but take offs and such you have to figure.the blue book gives it all
1112455
You might be thinking of a Reuleaux (or Rouleaux) triangle, but it has rounded sides, not rounded corners.
815746
It looks as if there's one big triangle, but in fact the smallest angle of the green triangle isn't the same as the smallest angle of the red triangle, and so although it looks as if there's one big triangle cut up, it isn't so.  And rearranging it makes the hole appear.  I can do a diagram showing just where the extra area unit is, but not on here.\n\nDo you know trigonometry? If so, notice the tangents of the two angles I mentioned are different.  One is 2/5 and the other is 3/7.\n\nIf you don't know trigonometry, just notice that the green triangle has the sides about the rightangle in the ratio 2:5, the red triangle has them in the ratio 3:7.  It's the swapping of the positions of those two triangles that takes up the extra area.  The green triangle has the smaller angle, so when it's the lower triangle the "hypotenuse" of the big triangle has an inward kink.  When the red triangle is the lower one it has an outward kink.  The space between these two "hypotenuses" is one square unit of area.
143766
Simple!  A manhole is round so that the cover can never fall in.  If it were any other shape, like a square, rectangle or oval, you could take the cover out, flip it sideways and drop it in, but with a round hole and a round cover, it will always be just a little too big.\n\nPart 2:  I would still call it a hole if it was square.  Why wouldn't you?  Plenty of holes aren't round.  Button holes are very narrow compared to their length.  And I guess the Indian Government aren't concerned with people dropping manhole covers into a sewer, or didn't think about it.
77085
Because it is refracting light that is coming from all around. When you see a rainbow produced by a prism it looks straight but if you were able to enlarge it enough it would be round.