Students understand the definition of a general pyramid and cone and that their cross sections are similar to the base. Students show that if two cones have the same base area and the same height, then cross sections for the cones the same distance from the vertex have the same area.
Teacher and Student versions of full lesson from engageNY
What if you were given a three-dimensional figure like a pyramid and you wanted to know what that figure would look like in two dimensions? What would a flat slice or an unfolded flat representation of that solid look like? After completing this Concept, you'll be able to use cross-sections and nets to answer questions like these.
Lessons, videos, exercises, and text from CK-12. Additional resources available at this site.