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1.6A Audience: First Grade. Behavior: Classify 2-dimensional shapes using informal geometric language. Condition: Ancho Chart. I would introduce some familiar 2D shapes and ask the students to identify how many sides and vertices using an anchor chart.

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These free worksheets include two pages for students to name 2D shapes by identifying the number of sides and vertices. Shapes included: octagon, decagon, heptagon, hexagon, pentagon, circle, square (quadrilateral), and triangle. Need shape posters for word walls?

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Triangle Measurement Interactive Notebook Page - showing proof that the interior angles of a triangle have a sum of 180 degrees. So much better than just telling students. Show the proof.

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Here's a page for use with the book THE GREEDY TRIANGLE by Marilyn Burns. As the triangle changes its shape, students build each shape with marshmallows and toothpicks and record information about sides, angles, and vertices.

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Geometry Nets! 6th grade Geometry 6.G 4. Represent three-dimensional figures using nets made up of rectangles and triangles, and use the nets to find the surface area of these figures. Apply these techniques in the context of solving real-world and mathematical problems. Students can make these nets and figure out the number of faces, vertices and edges.

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Kids Geometry Vocabulary: Sides, Vertices and Equal

**FREE** Kids Geometry Vocabulary: Sides, Vertices and Equal Worksheet. Help your child identify basic words used when describing geometric shapes with this printable flashcard.

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How many triangles can you make with 9 sticks? Kids can reinforce geometry and critical thinking skills through creating various shapes with sticks.

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