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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G C Right Triangles Inscribed in Circles I

For Teachers 9th - 10th Standards
This task provides a good opportunity to use isosceles triangles and their properties to show an interesting and important result about triangles inscribed in a circle with one side of the triangle a diameter. The fact that these...
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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.] Apply the properties of isosceles triangles.
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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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Lesson Plan
Alabama Learning Exchange

Alex: Tan Ii

For Teachers K - 1st Standards
The Chinese character mark for Tan II (pronounced she-tow-bah) is the second of two lessons to introduce first grade learners to geometry using tangrams. This instructional activity incorporates history, math, and language arts. In this...
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Lesson Plan
Alabama Learning Exchange

Alex: A Triangle to Remember

For Teachers 4th Standards
This lesson will introduce students to different types of triangles by using a clip from the movie A Walk to Remember. They will take part in interactive tutorials to strengthen the concepts of classifying triangles. The students will...
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Handout
Geometry Help

Geometry Help: Equilateral Triangles

For Students 9th - 10th Standards
Explains the basic concept of equilateral triangles with step-by-step instructions and methods for solving specific problems on your own relating to this topic.
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Lesson Plan
PBS

Pbs Learning Media: Triangles: Targeted Math Instruction

For Students 9th - 10th Standards
Students will learn how to apply the properties and characteristics of all triangles to solve real-world problems and identify and use the unique characteristics of right, isosceles, equilateral, acute, obtuse, and scalene triangles.
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Unknown Type
Other

Mathematics Internet Library: Free Internet Books

For Students K - 1st Standards
Practice problem worksheets are available for learners needing to study basic terms relating to triangles and other math concepts.
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Activity
National Council of Teachers of Mathematics

The Math Forum: Problems Library Geometry Triangles

For Students 9th - 10th Standards
This site contains a wealth of problems that deal with the basic definitions of medians, altitudes, angle bisectors, and perpendicular bisectors or the defining characteristics of the different types of triangles. There are also...
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Unknown Type
Rice University

Rice University: Cynthia Lanius: Isosceles Triangle Puzzler

For Students 6th - 8th Standards
This site directs the student to answer true or false questions about isosceles triangles and explain their answers.