Handout
Wolfram Research

Wolfram Math World: Geometric Mean

For Students 9th - 10th
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.
eBook
Math Planet

Math Planet: Geometry: Mean and Geometry

For Students 9th - 10th Standards
The geometric mean is explained through examples and a video lesson. [1:12]
Activity
Texas Instruments

Texas Instruments: Numb3 Rs: Harmonizing Means

For Teachers 9th - 10th
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...
Activity
Free Math Help

Free Math Help: Geometric Mean

For Students 9th - 10th Standards
The resource explores the geometric mean. A definition, example, and formula are included.
Website
National Council of Teachers of Mathematics

The Math Forum: Means Proportional and Geometric Means

For Students 9th - 10th Standards
Dr. Math helps a student discover the meaning of the mean proportional of two numbers. Detailed explanation with examples.
Lesson Plan
Alabama Learning Exchange

Alex: Geometric Mean and Indirect Measurement

For Teachers 9th - 10th
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...
Website
Other

Pallladio: The Geometric Mean

For Students 9th - 10th Standards
This site details a specific problem using the geometric mean. At the bottom of the page is a summary of the geometric mean.
Handout
CK-12 Foundation

Ck 12: Geometry: Right Triangle Similarity Study Guide

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] An overview of altitudes and geometric mean is provided in this study guide.
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Practice Problems: Variations

For Students 9th - 10th
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...
Activity
Texas Instruments

Texas Instruments: Probability as Relative Frequency

For Teachers 9th - 10th Standards
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...
Lesson Plan
Oswego City School District

Regents Exam Prep Center: Congruence of Triangles

For Teachers 6th - 8th Standards
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...
Unit Plan
Texas Education Agency

Texas Gateway: Similar Right Triangles: The Altitude to the Hypotenuse

For Students 9th - 10th
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.
Handout
Other

Stat Soft: Statistics Glossary

For Students 9th - 10th
Dozens of statistical terms are defined and illustrated in this glossary.
Lesson Plan
CPALMS

Cpalms: Building Graduation Caps

For Teachers 9th - 10th Standards
[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...
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Sequences and Series

For Students 9th - 10th Standards
Hotmath provides 20 practice problems relating to sequences and series. Each of the practice problems include a step-by-step guide for solving.
Lesson Plan
Crayola

Crayola: Mandala Geometry

For Teachers 6th - 8th
Combine geometric designs while honoring the entire universe. Discover how colors and shapes have meaning in traditional mandala art forms.
Unit Plan
AAA Math

Aaa Math: How to Determine a Ratio

For Students 5th - 8th Standards
This site explains the meaning of ratio and how to determine a ratio. Gives practice and games to practice this skill.
Whiteboard
ClassFlow

Class Flow: Understanding Slope

For Teachers 9th - 10th
[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.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Inscribed Similar Triangles

For Students 9th - 10th
[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.
Activity
Math Medics

S.o.s. Math: The Derivative

For Students 9th - 10th Standards
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.
Activity
Ministry of Education and Universities of the Region of Murcia (Spain)

Ministerio De Educacion Y Ciencia: Simetria De Las Funciones Polinomicas

For Students 9th - 10th Standards
In this activity you can learn the geometric and algebraic meaning of the symmetry about any point and any vertical axis.
Handout
Math Words

Mathwords: Terms and Formulas From Algebra I to Calculus

For Students 9th - 10th
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,...
Handout
Other

The Alphabet of Art: Shape

For Students 9th - 10th
Definition of shape as it applies to the visual arts with examples by Duchamp and McKnight. Links to definitions of other elements of art.
Unit Plan
Wolfram Research

Wolfram Math World: Perpendicular Lines

For Students 9th - 10th Standards
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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