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symbols

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What does 2xy mean? 2011-12-07
From dana:
I don't know what is 2xy what does that mean? is it 2x+2y or 2x times y Please help! thank you for your time!! :)
Answered by Penny Nom.
pi/2 + 12/13 2011-05-24
From Jen:
If you have (pi/2) and you want to add it to (12/13), how would you go about it?
Answered by Chris Fisher.
express the number 100 using the same figure 6x 2006-06-17
From A student:
express the number 100 using the same figure 6x
Answered by Stephen La Rocque.
Right angles 2006-01-25
From AshLee:
I was recently given a challenge in my Algebra class. My teacher wanted to know about a right angle. He said he would give five bonus points to the person that could bring in information. (I know five bonus points may not seem like a lot but in this class, they are.) I looked on this site and I found out why it was called a right triangle, but my teacher want to know where did that theory come from. I was wondering too... not just because of the bonus points.
Answered by Penny Nom.
Why is the letter J used for the integers? 2004-01-13
From Amanda:
Why is the letter J used to represent intergers as a symbol?
Answered by Penny Nom.
< and > 2002-08-30
From Kelsey:
What is the origin of the greater (>) than and less (<) than signs?
Answered by Harley Weston.
Division symbol 2001-12-12
From Amanda:
What is the name of the symbole used in a long divison problem that seperates the two factors? It looks like a little house.
Answered by Penny Nom.
Sigma 2001-03-31
From A student:
What does the Sigma symbol mean in mathematics?
Answered by Penny Nom.
Infinity Symbol 1999-07-13
From Mark E. Kelly:
There is a symbol that looks like a sideways 8 that is used to represent infinity. Does it have a name?
Answered by Doug Farenick and Penny Nom.
The origin of angles 1998-02-24
From Marc Poulin:
I'm currently teaching angles to students in grade 10 and I've been asked what's the origin of the terms degrees, radians and gradians.

I know that the radians come from the sexagesimal numerical system of the Babylonians but my kids wanted to know dates and persons who would have brought these terms first.
Answered by Harley Weston.

 
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