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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Aa Similarity (Intermediate)

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to identify whether or not two triangles are similar using AA Similarity.
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eBook
CK-12 Foundation

Ck 12: Interactive Geometry: 6.5 Sss Triangle Similarity

For Students 9th - 10th Standards
Explore and understand two triangles that are similar.
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eBook
CK-12 Foundation

Ck 12: Interactive Geometry: 6.4 Sas Triangle Similarity

For Students 9th - 10th Standards
Explore and understand triangle similarity.
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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 young scholars to geometry using tangrams. This lesson plan incorporates history, math, and language arts. In this...
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Activity
National Council of Teachers of Mathematics

Nctm: Figure This: Math Challenges for Families

For Students 2nd - 8th
Students, teachers, and parents alike will enjoy this challenging math site. It contains a clever brain teaser section plus creative problems related to algebra, geometry, measurement, numbers, statistics, and probability. A Spanish...
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Lesson Plan
Shodor Education Foundation

Shodor Interactivate: Lesson: An Introduction to Quadrilaterals

For Teachers 9th - 10th Standards
Quadrilaterals-parallelograms, rectangles, and trapezoids-are thoroughly introduced in this lesson plan for upper elementary and middle school learners. Lots of resources are linked to it to help support the teacher and students....
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Unit Plan
Cuemath

Cuemath: Triangles

For Students 5th - 8th Standards
Explore everything about triangles. Learn about the different types, important properties, and how to find its area and perimeter. Check out the solved examples and interactive questions for better understanding.