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It has to do with the original shapes of numbers. Originally it was not open at the top. Number shapes as we use them come from the number of inside angles they has.
0 had none, 1 had 1, 2 had 2, and so on.
Look at the 4 the way it is shaped in this sentence. it has 3 inside angles in the top portion and 1 made by the tail that drops below the triangle that makes the top portion.
the original shapes of all the numbers follows a similar pattern.
What else can I help you with?
What is the name of the polygon that is shaped like a yield sign?
A yield sign is shaped like an upside-down triangle.
Why does a six looks like a nine and a nine looks like a nine?
Because if you turn a nine upside down then it does not look like anything but if you turn a six upside down then it looks like a nine.
What does the perpendicular to sign look like in maths?
It looks like an upside-down "T".
Adwhat does a perpendicular line look like?
A line which forms a right angle with another line (think an upside-down T) Actually it doesn't have to be upside-down...
What two continentsa are similar in physical shape?
If you have a malleable imagination, you might say that North America and South America are similarly shaped. You might also say that Australia looks like the continental USA upside down.
The human heart is shaped like a?
the human heart is shaped like a upside down pear
What is a blue whales tail shaped like?
It is shaped like an upside triangle with a line down the middle.
What is the name of the polygon that is shaped like a yield sign?
A yield sign is shaped like an upside-down triangle.
Which continent is shaped like an upside down boot?
Italy is the "boot-shaped" country in Europe, not a continent.
Is a frogs large intestine coiled?
No. It is shaped like an upside down U
Shape of mount erebus?
Erebus is shaped like most volcanoes -- like an upside-down cone.
Number turned upside down will be increased by 12?
86 which upside down looks like 98. Difference between them is 12
What is Africa often called due to the fact its land is shaped like an upside down pie plate?
It's often called, believe it or not, actually called upside down pie! Hope this helped:)
What type of housing does the tribe Caddo live in?
they lived in cone shaped huts that looked like a upside down bowl
How can you tell the difference of clams and oysters?
A clam is smooth and is shaped like an upside down skirt. An oyster can be be bumpy or smooth it can be circle or an oval.
How much are books with upside down binding worth?
Books that have upside down binding may be a collectors item. Like upside down stamps are.
The shape of the large intestine?
The lage intestine is shaped like an upside L.
