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The octant of a sphere is a spherical triangle with three right angles.. Spherical trigonometry is the branch of spherical geometry that deals with the metrical relationships between the sides and angles of spherical triangles, traditionally expressed using trigonometric functions.
Shoelace scheme for determining the area of a polygon with point coordinates (,),..., (,). The shoelace formula, also known as Gauss's area formula and the surveyor's formula, [1] is a mathematical algorithm to determine the area of a simple polygon whose vertices are described by their Cartesian coordinates in the plane. [2]
The boundary of a Reuleaux triangle is a constant width curve based on an equilateral triangle. All points on a side are equidistant from the opposite vertex.
One radian is defined as the angle at the center of a circle in a plane that subtends an arc whose length equals the radius of the circle. [6] More generally, the magnitude in radians of a subtended angle is equal to the ratio of the arc length to the radius of the circle; that is, =, where θ is the magnitude in radians of the subtended angle, s is arc length, and r is radius.
The Siku Quanshu Zongmu Tiyao, or the Annotated Bibliography of the Four Treasuries, [1] is an annotated catalog of the thousands of works that were considered for inclusion in the Siku Quanshu (Complete Library of the Four Treasuries). Work for the 200-chapter catalog began in 1773 and was completed in 1798. [2]
Siku also works in the computer games industry and as a conceptualist and freelance concept artist. His latest work is The Manga Bible: From Genesis to Revelation , an adaptation of Today's New International Version of the Holy Bible into manga format.
The siku is originally from the Aymaras of Peru and Bolivia, where a woman would play her siku as she came down from the mountains.Since the largest siku has every note (A-G), and was too big for the woman, they often got two sikus (usually smaller ones) that would be played together with someone else, so they could play them continuously after each other and thus the scales could fully be played.
Siku (also spelled Siqu) (Aymara siku or siqu a kind of flute, also spelled Sekho, Seko) [2] or Siq'u (Quechua for slidable rope; perforated) [3] are the names of a mountain in the Bolivian Andes which reaches a height of approximately 4,740 m (15,550 ft).