Which mathematical product design innovation, introduced in the early 1980s, revolutionized geometry education by allowing students to manipulate and explore shapes through dynamic visualization?

In the world of educational mathematics products, innovation in design can dramatically impact learning outcomes. One particular design revolution transformed how students interact with mathematical concepts, making abstract ideas more tangible and accessible. This product design approach has since influenced countless math learning tools and platforms. Test your knowledge about this significant mathematical product design evolution!

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Dynamic Geometry Software (like Geometer's Sketchpad)
Electronic Graphing Calculators (like TI-81)
Mathematical Symbol Processing Software (like MathType)
Computer Algebra Systems (like Mathematica)