eBook
Ck 12: Interactive Geometry: 13.3 Sas Triangle Congruence eBook
CK-12 Foundation

Ck 12: Interactive Geometry: 13.3 Sas Triangle Congruence

For Students 9th - 10th Standards
See how two triangles are congruent it means that all corresponding angle pairs and all corresponding sides are congruent.
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Lesson Plan
Smile: Similarity Lesson Plan
Science and Mathematics Initiative for Learning Enhancement (SMILE)

Smile: Similarity

For Teachers 9th - 10th Standards
This site contains a lesson plan for high school age students. The objective is to discover the factor of proportionality in similar polygons and to relate this factor to the perimeters and areas of similar polygons.
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