It depends on how you are using the word "half".
Most of the time it is used as an adjective.
If the word is being used as part of a mixed numeral, then the word is preceded by "and a": "I used three and a half cups of flour in the cake."
If the word is being used to denote 50% of a single countable item, then you may use "a half" or "half a(n)", but never "a half a(n)":
"We will be there in half an hour."
"We will be there in a half hour."
It is never correct to use "We will be there in a half an hour."
If the word is being used to denote 50% of an uncountable or plural countable item, then the word is followed by "the" or "of the":
"Jane used up half the napkins during dinner."
"Bob lost half of his marbles in the game."
Idiomatically, there exists "half and half", which is approximately 50% cream and 50% milk. This is a noun and is used the same way as the word "milk" with nothing extra needed: "I poured half and half in my coffee."
1.I know three examples of fraction. 2. I am really good at fraction. 3. One-half is an example of fraction.
i had a graph
A time that your in or already been in just put in word on paper in a sentence.(syaysa)
Yes
In a circle, the radius is half of the diameter.
I creased the paper exactly down the half line.
I need to talk to you urgently. Could we meet somewhere in town in half an hour?
When I put the down payment on the new car, I will be owing less than half the purchase price.
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