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Updated by Desmos Links on Apr 15, 2019
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PreAlgebra

Trapezoid Decomposer - Method 1 Student eTool (Desmos)

Trapezoid Decomposer - Method 1 Student eTool (Desmos)

Trapezoid Decomposer - Method 2 Student eTool (Desmos)

Trapezoid Decomposer - Method 2 Student eTool (Desmos)

Triangle Inequality Student eTool

Triangle Inequality Student eTool

Triangle Creation Student eTool

Triangle Creation Student eTool

Shaded Rectangles • Polygraph by Desmos

by Andrew Stadel. Edited with love by Desmos Teaching Faculty. Designed to spark vocabulary-rich conversations about fractions and part-to-whole relationships. Key vocabulary that may appear in student questions includes: shaded, unshaded, fraction, part, whole, numerator, denominator, simplified, and equivalent/equal to.

Rectangles • Polygraph by Desmos

At first glance, these are just rectangles, but many perimeters and areas have been strategically chosen. As students play, my hope is they will gain a deeper understanding of perimeter, area, and their independence.