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Area with index cards

Area with index cards
Area with index cards
Area with index cards
Area with index cards
Area with index cards
Area with index cards
Area with index cards
Area with index cards
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Product Description
Have you ever wondered where the area formulas for triangles, trapezoids and parallelograms came from? In this activity, I walk you through how to derive these formulas using index cards. The activity is designed to build strong, conceptual understandings while creating a hands-on product that they can keep in their notebooks for years to come!
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Teaching Duration
1 hour
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