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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Isosceles Triangles

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This concept will teach students the properties of isosceles triangles and how to apply them to different types of problems.
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Midsegment Theorem

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] This concept teaches students the midsegment theorem and how to apply it.
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Midsegment Theorem

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Apply the Midsegment Theorem.
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Unknown Type
Khan Academy

Khan Academy: Find Angles in Congruent Triangles

For Students 9th - 10th Standards
Given two triangles, determine whether they are congruent and use that to find missing angle measures. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Interactive
Starfall

Starfall: Puzzles

For Students K - 1st
In this interactive students click on one of the black statues to break them down into shapes; then they reconstruct the statue by putting the puzzle pieces together, which shows the animal that it represents and replaces the statues...
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Lesson Plan
Alabama Learning Exchange

Alex: Have Your Math and Eat It, Too!

For Teachers 6th - 8th
In this two-day lesson, learners will collaborate to create a healthy pizza using only geometric items that have been precisely measured. Students must identify the items as triangle, quadrilateral (parallelogram), or cube. Next,...
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Lesson Plan
Better Lesson

Better Lesson: Finding the Area Review and Assessment

For Teachers 6th Standards
Sixth graders find the area of rectangles, triangles, parallelograms, and trapezoids by using formulas or by composing into rectangles or triangles.
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Interactive
National Council of Teachers of Mathematics

Nctm: Illuminations: Simson Line

For Students 9th - 10th Standards
This applet allows for the construction and exploration of the Simson Line.
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eBook
CK-12 Foundation

Ck 12: Interactive Geometry: 7.2 Sine and Cosine Ratios

For Students 9th - 10th Standards
Discover sine and cosine ratios in trigonometric ratios.
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eBook
CK-12 Foundation

Ck 12: Interactive Geometry: 7.6 Law of Sines

For Students 9th - 10th Standards
Explore and apply the Law of Sines.
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eBook
CK-12 Foundation

Ck 12: Interactive Geometry: 1.7 the Pythagorean Theorem

For Students 9th - 10th Standards
Explore and discover the Pythagorean theorem.
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Professional Doc
Louisiana Department of Education

Louisiana Doe: Louisiana Believes: Eureka Math Parent Guide: Angle Measure and Plane Figures

For Students 4th Standards
A guide to support parents as they work with their students in angle measure and plane figures.
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Activity
PBS

Pbs Learning Media: Shapes: Peg + Cat

For Students Pre-K - K Standards
We are learning about how shape attributes helps us to see how shapes are alike and different. This site provides four resources for shapes including 3-D.
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Handout
Purple Math

Purplemath: Ratios

For Students 6th - 8th Standards
Explains the basic terminology and formatting of ratios, and demonstrates how to solve typical exercises.
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Unit Plan
E-learning for Kids

E Learning for Kids: Math: Russian Toy Store: Angles Ii

For Students 5th - 6th
Students will play learning games to explore triangles, angles, and angle measurement.
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Unit Plan
E-learning for Kids

E Learning for Kids: Math: Riksjas, Toek Toek: Polygons

For Students 5th - 6th
Explore polygons with Wang, a ricksha puller. Answer his questions and he will give you a free ride!
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Unit Plan
E-learning for Kids

E Learning for Kids: Math: Dojo: Polygons and Time Zones

For Students 5th - 6th
Students will play several learning games to explore polygons such as triangles, and how to determine the area of triangles and the different types of triangles. They will also explore time zones.
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Interactive
Government of Alberta

Learn Alberta: Exploring Angles Within a Triangle

For Students 6th - 8th
This multimedia site offers a video [1:29] of how angles are important in the construction of bikes. Visit the interactive exercises to continue this beginner's guide to understanding angles in a triangle. Printable extended exercises...
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Activity
University of Georgia

University of Georgia: Altitudes & Orthocenters: Making Connections

For Students 9th - 10th Standards
This site describes altitudes and orthocenters in triangles and their connections with the nine-point circle.
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Graphic
History is Fun

Jan Brett: Geometric Shapes Flashcards Pdf

For Students Pre-K - 1st Standards
Print out these colorfully illustrated PDF file pages to practice learning your basic two dimensional geometric shapes. Fold them in half and one side shows the shape while the other side shows the shape with the correct name. Put them...
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Unit Plan
Vernet -Virtual Education Resources Network

Salon Hogar: Referencia Rapida De Formulas Geometricas

For Students 9th - 10th Standards
This site provides the user with a useful reference to different geometric forms, their elements, formulas, and areas. Entirely in Spanish.
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Handout
The Math League

The Math League: Figures and Polygons

For Students 3rd - 8th Standards
This website has basic definitions for most polygons, regular and irregular.
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Activity
Ministry of Education and Universities of the Region of Murcia (Spain)

Ministerio De Educacion Y Ciencia: Baricentro De Un Triangulo

For Students 9th - 10th Standards
Discover how to find the centroid of a triangle with this interactive activity. [Requires Java.]
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Interactive
Doina Popovici

Math Play: Classifying Triangles

For Students 4th - 6th Standards
Practice identifying triangles as either acute, right, or obtuse in this interactive game.