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- Factors and Multiples [01/27/1998]
My son is in 4th grade and needs help naming a common multiple of a pair
- Flips, Reflections, Rotation, and Quadrants [11/10/1998]
These terms are being used to describe the movement of shapes. What do
they really stand for?
- The Fourth Dimension [8/24/1995]
What is the fourth dimension mathematically?
- Fraction Multiplication [7/22/1996]
The meaning of the dot between two fractions.
- Golden Triangle: An Isosceles Triangle [01/23/2001]
What is the Golden Triangle?
- Golden Triangle: What is It? [09/19/1999]
What is a Golden Triangle?
- Grad as a Measure of an Angle [03/20/2002]
I would like to know about the origins, use in the past, and whether (and
how) the grad is used now.
- Greater/Less Than Signs [04/09/1997]
I always get my greater and less than signs mixed up. Which is which?
- Greater Than and Less Than Symbols [05/30/2000]
What does it mean when a greater than or less than symbol appears before
a number, with nothing to the left of the symbol?
- Grouping Symbols [08/27/1998]
I need the names of four grouping symbols. I already know of parentheses
and brackets so that takes care of two...
- Harmonic Mean [12/15/1996]
What is the harmonic mean and how do you use it?
- Hexagon vs. Hexagram [01/11/1999]
What is the difference between a hexagon and a hexagram?
- Histogram [04/16/2001]
What is a histogram? What makes a histogram good?
- Historical Dozen [03/19/2002]
Why do we ship products in quantities of 12?
- History of Abscissa [03/26/2001]
Where does the word abscissa come from?
- History of the Word [08/21/2006]
Why is a ruler called a ruler?
- History of the Word 'Exponent' [11/26/2003]
Who came up with the name 'exponent'?
- 'Honest' Numbers [11/11/2002]
My teacher asked the class: What is the only 'honest' number?
- How Fast is a Knot? [12/21/1995]
Ships travel in knots (which is a speed). How fast is a knot?
- How the Trig Functions Got their Names [12/14/1997]
I can guess why three of the trig functions are called cosine, cotangent,
and cosecant. But why were the other three named the sine, the tangent,
and the secant?
- Identifying Algebraic Properties [12/29/1996]
How do you identify which algebraic property has been used in each step
of a simplification process?
- Identity and Inverse Properties for Zero [01/07/2004]
If we subtract 0 from a number and get the same number, doesn't that
make 0 an identity for subtraction? Also, can't a number be its own
inverse for subtraction?
- Incenter, Orthocenter, Circumcenter, Centroid [01/05/1997]
I have been having trouble finding the Euler line of a triangle.
- Inclusive and Exclusive Definitions [04/05/2001]
Are squares rectangles? Are rectangles squares?
- Inclusive vs. Exclusive Definitions [01/24/2002]
My geometry teacher says that a square is not also a rhombus, a
rectangle, and a parallelogram. Please help!
- Interpreting the Difference Between Two Numbers [09/22/2006]
If a question asks "What is the difference between 15 and 12" or "What is the difference between 12 and 15," would your responses be +3 and -3 respectively? Or would they both be +3?
- Intersection of Circles [10/08/1998]
I do not understand the term intersection in geometry.
- Introduction to Quadrants in the Coordinate Plane [02/05/2004]
What is a quadrant? How do you find it? I had to identify 9 ordered
pairs on a graph. Now I need to also name the quadrant each one is in.
- Is a Circle a Polygon? [03/07/1999]
A circle is not a polygon.
- Is an Equilateral Triangle Also Isosceles? [02/19/2008]
Can equilateral triangles also be classified as isosceles? In other
words, does an isosceles triangle have exactly two equal sides or at
least two equal sides?
- Is a Square a Rectangle? [06/04/1997]
Are squares rectangles? What is a pentagon?
- Is Kite the True Name? [03/29/2002]
Is kite the true math name for this shape, or is there another?
- Is the Fraction N/N Considered Proper or Improper? [10/31/2003]
If a fraction has an equal numerator and denominator, what is it
called? Is it proper, improper, or something else?
- Is Zero Really a Number or Just a Concept? [09/15/2005]
I've been taught that infinity is just a concept, not an actual
number. I'm wondering if the same thing can be said of zero?
- K as an Abbreviation for Thousands [05/29/2002]
I was taught that 30K meant thirty thousand. Is that correct?
- Larger Than and As Large As [08/01/1999]
If the percussion section has 6 people, does the expression "the brass
section is three times larger than the percussion section" mean that the
brass section is 3*6 = 18 people or 4*6 = 24 people?
- Latin Origins of Trig Functions [11/20/1998]
What are the etymologies of the six trigonometric functions: sine,
cosine, tangent, cosecant, secant, and cotangent?
- Least Common Multiple with Zero [03/26/2003]
I'm trying to find any reference about the least common multiple of
two numbers when one (or both) is zero.
- Left Angles [06/01/1999]
What is a left angle?
- Leg of a Triangle [04/02/2002]
I need to know where the name "leg" of a triangle comes from, or what its