National Council of Teachers of Mathematics
The Math Forum: Definition of the Dot Product
Definition of dot product and an application.
National Council of Teachers of Mathematics
The Math Forum: Dot Products of Non Unit Vectors
Description of finding the formula for the dot product of any two vectors.
National Council of Teachers of Mathematics
The Math Forum: Surface Area of a Sphere
This site from Dr. Math at the Math Forum provides a concrete way to prove to students the formula for the surface area of a sphere.
National Council of Teachers of Mathematics
The Math Forum: Credit Card Debt
This Ask Dr. Math site contains a question about how long it will take to repay a credit card debt at a particular APR and particular amount per month.
National Council of Teachers of Mathematics
Nctm: Figure This: Basketball Picks
A math challenge taken from the NBA that is sure to interest true basketball fans. Use your data collection, organization, and analysis skills to figure out which teams play each other. A one page NCTM Math Challenges for Families...
National Council of Teachers of Mathematics
Nctm: Figure This: Who Wins the Game?
A math challenge for the basketball enthusiast. This NCTM Math Challenges for Families activity focuses on the concept of probability. Test your problem solving aptitude as you try to figure out who will probably win the game.
National Council of Teachers of Mathematics
Nctm: Illuminations: Personal Number
Find your personal number using your birthday. It is the month + date + year and month X date X year.
National Council of Teachers of Mathematics
Nctm: Illuminations: Tower of Hanoi
Use this applet to solve the Towers of Hanoi puzzle.
National Council of Teachers of Mathematics
Nctm: Illuminations: Paper Pool
This applet allows you to investigate the game of Paper Pool.
National Council of Teachers of Mathematics
Nctm: Illuminations: Triangle Classification
Use this applet to show how the placement of the third vertex of a triangle affects the classification of that triangle.
National Council of Teachers of Mathematics
Nctm: Figure This: Seeing Stars
Can you draw a picture of the stars on an American flag?
National Council of Teachers of Mathematics
Nctm: Figure This: Can You Turn a Frown Into a Smile?
This math challenge activity focuses on the concept of morphing. Test your problem-solving aptitude as you try to morph a frown into a smile.
National Council of Teachers of Mathematics
Nctm: Figure This: Is There Room for All These Gifts?
This math challenge activity focuses on the concept of organizing information. Test your problem-solving aptitude as you try to figure out who received the most gifts.
National Council of Teachers of Mathematics
Nctm: Figure This: Tournaments
Math activity challenges you to find out how many more games need to be played in the modern 1999 NCAA tournament during March Madness than in 1985?
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Pi and the Area of Circles
Contains a question pertaining to finding the area of a circle.
National Council of Teachers of Mathematics
The Math Forum: Plane Figure
This site provides a definition for plane figure (at the top of the page) and a few examples.
National Council of Teachers of Mathematics
The Math Forum: Restrictions on Roots
A question is asked if there are any restrictions on "n" when talking about the nth root of a number.
National Council of Teachers of Mathematics
The Math Forum: Number Tricks
This site from the Drexel University gives a few number tricks and asks for you to make a number trick of your own, it really is not difficult, yet to the non-math oriented seems like magic.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Cramer's Rule in Action
This site provides a specific example of Cramer's Rule. The site does not explain why Cramer's Rule works, yet does a fair job of expressing the method to reach the answers.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Volume of a Triangular Tank
This question and answer site solves a volume problem for a triangular tank.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Is a Sphere 2 D or 3 D?
Do you think you know weather a sphere is two dimensional or three dimensional? Read this question posed to Doctor Math, very interesting.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Sphere Eversion
This question and answer site provides links to sites that show how to mathematically turn a sphere inside out.
National Council of Teachers of Mathematics
The Math Forum: Angles of an Octahedron
This question and answer site from The Math Forum with Dr. Math discusses the angle between two adjacent faces of an octahedron. Links are also provided for additional information on related subjects.
National Council of Teachers of Mathematics
The Math Forum: Volume and Surface Area of a Cone Frustum
This question and answer site deals with the derivation of the formula for the surface area for the frustum of a right circular cone.