# Modifiable Solid: Square Cross Sections Parallel to yAxis

## HOW TO USE:

Enter any

**UPPER FUNCTION**(labeled upper(x)). Enter any**LOWER FUNCTION**(labeled lower(x)). Enter your**lower and upper limits of integration**("a" and "b", respectively). Slide the**FILLING**slider all the way to the left. For this solid, note how cross sections parallel to the yAxis are**squares**. Each side of this**square**has length upper(x) - lower(x). You can move this**square**by sliding the**MoveMe**slider. You can modify any of these parameters (functions, limits) at any time.**To explore in augmented reality, see the directions below this applet.**## TO EXPLORE IN AUGMENTED REALITY

1) Open up GeoGebra 3D app on your device.
2) Go to the MENU (horizontal bars) in the upper left corner. Select OPEN.
In the Search GeoGebra Resources input box, type

**bvt9xb3x**(Note this is the resource ID = last 8 digits of the URL for this resource.) 3) In the resource that uploads, zoom in/out if needed. You can alter the functions upper(x), lower(x). You can also move sliders a, b, MoveMe, and Filling. (Be sure to leave everything else alone.)## Quick (Silent) Demo

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