Quick Lamp Base Modeling Demo

Author:Tim Brzezinski

In this screencast, notice how the base is a frustum of an elliptical cone. That is, for this surface, cross sections of planes parallel to the floor and this surface are ellipses.

Quick Silent Demo

New Resources

Volume by Shells Around y
Circle Passing Through 3 Points
Equation of Locus - Parabola
Reflection Across 2 Parallel Lines
Prism Drawn in 1-Point Perspective

Discover Resources

Combo Transformation 1
Tangent Lines and Central Angles
Proof of pythagoras
Definite integral play 3
Similar Triangles and Intercepts

Discover Topics

Cuboid
Upper and Lower Sum or Riemann Sum
Symmetry
Trigonometric Functions
Pie Chart or Circle Chart