| Title | Height of the cactus |
| Brief description | The classic "how tall is the ___" based on shadow length similar triangle problem. In PowerPoint form, each slide adding one stage of the abstraction |
| Purpose | Contextual application |
| Topic(s) | Proportional geometry |
| Type of activity | Instructor led |
| Where work is done | In class |
| Time required | 0 to 10 minutes |
| Technology needed | None needed (i.e. technology optional) |
| Suggestions for implementation | Show first slide with the question "how tall is the cactus?" Ask what info would be helpful. Show next slide with my height. Then following slide with shadow lengths. Can show next slides which show the triangle abstraction. |
| Task developer(s) | David Lippman |
| College | Pierce College |
| Contact Info | [email protected] |
| License | Open (CC-BY) |
| Files: | Powerpoint slides Preview |
| Posted | December 19, 2012, 12:41 pm by David Lippman |
| Last Updated | December 19, 2012, 12:41 pm |
