Wolfram Research
Wolfram Math World: Geometric Mean
Geometric mean is defined, yet there are no links to help with notation at this MathWorld site. Still a good site to clarify your understanding of this geometric term.
Math Planet
Math Planet: Geometry: Mean and Geometry
The geometric mean is explained through examples and a video lesson. [1:12]
Texas Instruments
Texas Instruments: Numb3 Rs: Harmonizing Means
Based off of the hit television show NUMB3RS, this lesson exposes students to a different type of average, the harmonic mean. Although it is briefly reviewed in the lesson, students are expected to already be familiar with arithmetic and...
Free Math Help
Free Math Help: Geometric Mean
The resource explores the geometric mean. A definition, example, and formula are included.
National Council of Teachers of Mathematics
The Math Forum: Means Proportional and Geometric Means
Dr. Math helps a student discover the meaning of the mean proportional of two numbers. Detailed explanation with examples.
Alabama Learning Exchange
Alex: Geometric Mean and Indirect Measurement
In this inquiry-based lesson, students will work in groups to gather measurements needed to approximate the height of a building. Students will discover how geometric mean can be used to find the lengths of missing sides of right...
Other
Pallladio: The Geometric Mean
This site details a specific problem using the geometric mean. At the bottom of the page is a summary of the geometric mean.
CK-12 Foundation
Ck 12: Geometry: Right Triangle Similarity Study Guide
[Free Registration/Login may be required to access all resource tools.] An overview of altitudes and geometric mean is provided in this study guide.
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Variations
Twenty-three problems cover a variety of topics applied to variations. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View Solution" button to check...
Texas Instruments
Texas Instruments: Probability as Relative Frequency
In this activity, students use simulation to justify the concept of the Law of Large Numbers. They understand that as the sample size increases, the relative frequency of which an event occurs approaches the probability of that event...
Oswego City School District
Regents Exam Prep Center: Congruence of Triangles
Congruent means, "same size, same shape." Find out more about this concept at this test prep site with real world examples and pictures. Hands-on classroom activity and lots of practice. Knowledge of basic algebra and geometry concepts...
Texas Education Agency
Texas Gateway: Similar Right Triangles: The Altitude to the Hypotenuse
The student will apply and prove the definition of similar triangles and identify and apply the relationships that exist when an altitude is drawn to the hypotenuse of a right triangle, including the geometric mean.
Other
Stat Soft: Statistics Glossary
Dozens of statistical terms are defined and illustrated in this glossary.
CPALMS
Cpalms: Building Graduation Caps
[Free Registration/Login Required] In this lesson, students build geometric models of graduation caps using stiff paper. The activity requires the application of skills in finding surface area, understanding similarity, knowing the...
Varsity Tutors
Varsity Tutors: Hotmath: Sequences and Series
Hotmath provides 20 practice problems relating to sequences and series. Each of the practice problems include a step-by-step guide for solving.
Crayola
Crayola: Mandala Geometry
Combine geometric designs while honoring the entire universe. Discover how colors and shapes have meaning in traditional mandala art forms.
AAA Math
Aaa Math: How to Determine a Ratio
This site explains the meaning of ratio and how to determine a ratio. Gives practice and games to practice this skill.
ClassFlow
Class Flow: Understanding Slope
[Free Registration/Login Required] In this lesson students identify, interpret, and use the meaning of slope of a line as a rate of change using physical, symbolic, and technological models.
CK-12 Foundation
Ck 12: Geometry: Inscribed Similar Triangles
[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to apply similarity to solve for missing information in inscribed right triangles.
Math Medics
S.o.s. Math: The Derivative
This lesson does a nice job of clarifying what it means to find a derivative. The lesson gives an algebraic method for finding the derivative using limits and offers a geometric interpretation of the derivative.
Ministry of Education and Universities of the Region of Murcia (Spain)
Ministerio De Educacion Y Ciencia: Simetria De Las Funciones Polinomicas
In this activity you can learn the geometric and algebraic meaning of the symmetry about any point and any vertical axis.
Math Words
Mathwords: Terms and Formulas From Algebra I to Calculus
Mathwords is "an interactive math dictionary with enough math words, math terms, math formulas, pictures, diagrams, tables, and examples to satisfy your inner math geek." Written by a teacher of high school and college students,...
Other
The Alphabet of Art: Shape
Definition of shape as it applies to the visual arts with examples by Duchamp and McKnight. Links to definitions of other elements of art.
Wolfram Research
Wolfram Math World: Perpendicular Lines
This site explains what perpendicular means geometricly in mathematics, gives reference to orthoginality, and explains notation for perpendicular segments or lines.
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