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A hyperbolic sector is a region of the Cartesian plane {(x,y)} bounded by rays from the origin to two points (a, 1/a) and (b, 1/b) and by the hyperbola xy ... more

The area of a regular circumscribed polygon can be computed by the radius r of its inscribed circle and its perimeter p

The surface of a right regular pyramid can be calculated by the area and the perimeter of the base and the slant height

The inscribed sphere or insphere of cube is a sphere that is contained within the cube and tangent to each of the cube’s faces

A regular dodecahedron is a polyhedron composed of 12 regular pentagonal faces, with three meeting at each vertex. It has 20 vertices, 30 edges and 160 ... more

Prism is a polyhedron with an n-sided polygonal base, a translated copy (not in the same plane as the first), and “n” other faces (necessarily ... more

The second moment of area, also known as moment of inertia of plane area, area moment of inertia, polar moment of area or second area moment, is a ... more

Ratio of areas of similar triangles

A circumscribed circle or circumcircle of a triangle is a circle which passes through all the vertices of the triangle.The center of this circle is called ... more

The diameter of the circumcircle is related to the area of the triangle and the sines of the angles