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Browse High School Definitions

Stars indicate particularly interesting answers or good places to begin browsing.



(In)consistent and (In)dependent Systems [01/02/2007]
Systems of equations are classified using the terms consistent, inconsistent, dependent, and independent. I'm curious how those terms were chosen and how they fit the solutions of the systems.

Interpolation and Extrapolation [08/10/1999]
Can you give me a step-by-step procedure for finding missing values based on interpolation and extrapolation?

Interpreting Expressions Involving Cosine Squared [03/16/2007]
I don't understand the difference between cos(x)^2, cos^2(x) and (cos (x))^2. Are they all same?

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.

Inverse of a Function vs. Inverse Proportionality [11/20/2002]
Finding the inverse of a function and graphing yields a graph that has been reflected in the line y = x relative to the function. Inverse proportionality, however, yields a reciprocal relation graphically. Why do these two things have similar names yet mean different things?

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 Sphere 2-D or 3-D? [8/8/1996]
Is a sphere a two- or a three-dimensional object?

Is Kite the True Name? [03/29/2002]
Is kite the true math name for this shape, or is there another?

Isomorphisms [08/16/1999]
Can you give me an explanation and a nice example of isomorphism?

Is Zero Considered a Pure Imaginary Number (as 0i)? [12/02/2003]
In the complex plane, zero (0 + 0i) is on both the real and pure imaginary axes. Is 0 therefore a pure imaginary number as well as a real number?

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?

Josephus Problem [04/18/2003]
Every other person at a table is eliminated until there is only one person left. Who is the survivor?

The Königsberg Bridge [5/20/1996]
Do you have information on Konigsberg's bridge?

Lagrange Multipliers [01/08/1998]
I have a problem with Lagrange Multipliers - can you help?

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?

Laws of Arithmetic [02/12/1999]
The Distributive Law, Associative Law, Identity, and Commutative Equations.

Leg of a Triangle [04/02/2002]
I need to know where the name "leg" of a triangle comes from, or what its origin is.

Length of a Light-Year [1/31/1996]
How far is a light year in miles or kilometers?

Limit of x sin(1/x) [04/23/2002]
I assumed from the graph that the function had a limit at x=0 of 0, but since it involves sin(1/0) I can not prove this using the basic trigonometric limits (sin x/x and (1-cos x)/x), L'Hopital's rule, or by rearranging the equation. Can you help?

Linear Algebra - Definition of Orthonormal [10/28/1997]
Show that the transition matrix P from one orthonormal basis to another is unitary, that is, P*P = I.

Linear and Board Feet [01/04/1999]
Can you explain the terms linear foot and board foot as they are used in the lumber industry?

Linear Footage [04/20/2002]
There is a fence I want to buy, but the ad says '4 foot tall, 50 linear feet. What is a linear foot compared to a regular foot?

Line of Best Fit [8/1/1996]
Are a best-fit line, a line of best fit, and a fitted line synonymous?

Line or Ray Longer? [12/11/2001]
Which is longer, a ray or a line?

Locus [05/03/1999]
What is a locus?

Mass and Weight [08/16/1997]
Why are mass and weight both measured with the same unit? If weight is different on the moon and mass is not, what is the difference?

Mass versus Weight [09/09/99]
Do mass and weight refer to the same thing on earth? Is mass equal to weight?

Mass vs. Weight [01/22/1999]
Can you give me a definition of mass and how it differs from weight?

Mathematical Induction [09/07/1998]
What is mathematical induction? Can you give an example of the ideas of math induction?

Mathematical Meaning of Undefined [12/19/2002]
What is the meaning of the word 'undefined' in mathematical terms?

Mathematical Models [07/17/2002]
What is a mathematical model, and how would it be used?

Mathematics, Logic, and Intuition [05/27/2003]
How is math related to logic and intuition?

Math Symbol for C [12/15/1997]
I am puzzled by one symbol of typing math. What does the upper case letter C mean? As in (2C1) (3C1) / (47C2) = 6/1081.

Math Symbols [04/07/1997]
What do the common math symbols (backward E, upside-down A, etc.) mean?

Matrix Multiplication [09/04/1997]
I am doing a project in Algebra 2 and must research matrix multiplication.

The Meaning of Locus [03/04/2003]
What is the locus of points equidistant from two parallel lines 8 meters apart?

Meaning of '-ominoe' [11/07/2001]
We are drawing pictures of dominoes, triominoes, tetrominoes, and pentominoes. What is the meaning of the root "ominoe"?

The Meaning of 'Or' in Logic Statements [12/19/2003]
If a logic statement says, 'James is taking fencing or algebra,' does that mean he is taking one class or the other, or could he be taking both of them?

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