Watch Angles And Planes

Angles and planes are introduced with real world examples starting with Kepler's law concerning the Earth's ecliptic. The TI-Nspire is put to good use in an analysis of the design of the Himeji Castle in Japan with its line-of-sight tangents, acute angles, obtuse angles, and right angles. A second episode provides a thorough understanding of geological time periods and index fossils in planes of the Burgess Shale and other sedimentary rock formations. Tectonic plates and fault lines are illustrated in three dimensions to show the geometric form of intercepting planes created by cataclysmic earth movements. The detailed examples in this program provide a thorough understanding of how geometric concepts apply to earth and space sciences.