This shape consists of all the points in spherical coordinates for which rho goes from zero to a constant times cosine phi, and phi goes from zero to a constant less than pi over two. Spheres tangent to one of these and a plane are called Dandelin spheres. In cylindrical coordinates, the equation z equals r gives one of these shapes. Name this shape whose slices are used to generate ellipses, para
This shape consists of all the points in spherical coordinates for which rho goes from zero to a constant times cosine phi, and phi goes from zero to a constant less than pi over two. Spheres tangent to one of these and a plane are called Dandelin spheres. In cylindrical coordinates, the equation z equals r gives one of these shapes. Name this shape whose slices are used to generate ellipses, parabolas, and hyperbolas, and which has a volume equal to one-third pi times r squared times h.
This shape consists of all the points in spherical coordinates for which rho goes from zero to a constant times cosine phi, and phi goes from zero to a constant less than pi over two.
cones (accept double cone or conic)