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https://www.mathed.page/parabolas/trinomial.html

Henri Picciotto's Math Education Page

You can move the *○*s.

This applet is best used *after* making many rectangles with the Lab Gear blocks. Use it as a way to trigger discussion of patterns. What is the relationship between the numbers in the factored form and the ones in the expanded form? How do you see that relationship visually in the image?

The applet can also be used by teachers and students to create images for copying and pasting into a word processing or other document.

- For activities leading up to this conversation, and/or to follow it, see
*Algebra Lab Gear: Basic Algebra*, Challenges 6, 10, 15, 17, Lessons 9 and 10, and*Algebra Lab Gear: Algebra 1*, Sections 3 and 6.- (Where to get the books and the blocks.)

A similar applet, also showing the corresponding parabola: Trinomial

- Download:
- the GeoGebra file
- the Cabri file

- Related pages on this site:
- Squaring a Binomial
- Lab Gear
- Factored Form
- Making Connections
- More Algebra
- More Applets