Interactive
Curated OER

Shapes and Angles

For Students 4th
Are your geometry whizzes learning about angles and shapes? This online instructional activity gives 10 multiple choice questions based on images and word problems. Concepts include deducting angle degree, classifying shapes, and...
Lesson Plan
Curated OER

Exploring Special Segments in Triangles

For Teachers 9th - 12th
High schoolers discover that four special segments have a common intersection point. They identify the position of the intersection point in triangles. They produce conjectures about areas of the divided triangles.

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