anchor ring | horn torus | napkin ring | ring | ring torus | spindle torus

(c - sqrt(x^2 + y^2))^2 + z^2<=a^2

(for a torus with center at the origin, having rotational axis of symmetry about the z-axis, and with radius c from the center of the hole to the center of the torus tube and tube radius a; c>a corresponds to a ring torus, c = a to a horn torus (which is tangent to itself at the origin), and c

S = 4 π^2 a c

x^_ = (0, 0, 0)

V = 2 π^2 a^2 c

I = ((5 a^2)/8 + c^2/2 | 0 | 0 0 | (5 a^2)/8 + c^2/2 | 0 0 | 0 | (3 a^2)/4 + c^2)

(for a torus with center at the origin, having rotational axis of symmetry about the z-axis, and with radius c from the center of the hole to the center of the torus tube and tube radius a; c>a corresponds to a ring torus, c = a to a horn torus (which is tangent to itself at the origin), and c

2 (a + c)

concave solids | solids of revolution