Algebra Applicatons: Variables and Equations

Geology. Why do rivers meander instead of traveling in a straight line? In going from point A to point B, why should a river take the circuitous route it does instead of a direct path? Furthermore, what information can the ratio of the river's length to its straight-line distance tell us? In this segment the geological forces that account for a river's motion are explained. In the process, the so-called Meander Ratio is explored. Students construct a mathematical model of a meandering river using the TI-Nspire. Having built the model, students then use it to generate data to find the average of many Meander Ratios. The results show that on average the Meander Ratio is equal to p. Key math concepts covered include variables, equations, ratios, geometry and measurement, statistical mean, and data analysis. Students use the Geometry, Lists and Spreadsheets, and Calculator features of the TI-Nspire.

Category:

Education

Tags:

• ti-nspire
• nspire
• rivers
• meander
• ratio
• geology
• science
• pi
• ratios