 Illustration of a semicircle with chords and radii. Solids of Revolution

Illustration of an isosceles spherical triangle. Sphere With Arcs and Poles

A sphere with arcs and poles. "The distance of all points in the circumference of a circle of a sphere… Arcs Drawn on Sphere

Illustration of a sphere with arcs drawn. Circle Made by Plane Passing Through a Sphere

"Every section of a sphere made by a plane is a circle." Sphere Inscribed in a Cube

Illustration of a sphere inscribed in a cube. Sphere Inscribed in a Cube

Illustration of a sphere inscribed in a cube. Sphere Inscribed in Tetrahedron

Illustration of a sphere inscribed in a tetrahedron. Sphere Inscribed in Tetrahedron

Illustration of a sphere inscribed in a tetrahedron. Sphere Made by Revolution of Semicircle

Illustration of a sphere generated by the revolution of a semicircle ACB about its diameter AB as an… Material Sphere

Illustration of a material sphere that can be used to find its diameter. Plane Passing Through a Sphere

Illustration of a plane passing through a sphere. Sphere With Tangent Plane

Illustration of a sphere with a tangent plane. "A plane perpendicular to a radius at its extremity is… Sphere With Tangent Plane

Illustration of a sphere with a tangent plane. "A plane perpendicular to a radius at its extremity is… Polyhedral Angle in a Sphere

Illustration of a sphere with a polyhedral angle whose vertex is at the center of the sphere and whose… Polyhedral Angle in a Sphere

Illustration of a sphere with a polyhedral angle. A sphere with quadrants and poles. "A point on the surface of a sphere, which is at the distance of… Equal Spheres With Triangles

Illustration of equal spheres with equal triangles. Equal Spheres With Triangles

Illustration of equal spheres with equilateral and equiangular triangles. Intersecting Spheres

Illustration of two intersecting spheres. "The intersection of two spherical surfaces is the circumference… Isosceles Spherical Triangle

Illustration of an isosceles spherical triangle. Isosceles Spherical Triangle

Illustration of an isosceles spherical triangle. Polar and Spherical Triangles

Illustration of polar and spherical triangles. Polar Triangles in Sphere

Illustration of polar triangles. Symmetric Spherical Triangles

Illustration of symmetrical spherical triangles. Symmetric Spherical Triangles

Illustration of symmetrical spherical triangles. Symmetric Spherical Triangles

Illustration of symmetrical spherical triangles.