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In geometry, the square pyramid, a pyramid with a square base and equilateral sides, is one of the Johnson solids (J1). Image File history File links Johnson solid #1 Another attempt at using user:Cyps image:Poly. ...
The Elongated square gyrobicupola, a Johnson solid A Johnson solid is a convex polyhedron each face of which is a regular polygon, which is not a Platonic solid, Archimedean solid, prism or antiprism. ...
In geometry, the Triangular hebesphenorotunda is one of the Johnson solids (J92). ...
In geometry, the Pentagonal pyramid is one of the Johnson solids (J2). ...
A triangle is one of the basic shapes of geometry: a two-dimensional figure with three vertices and three sides which are straight line segments. ...
A square as a geometric shape is described and illustrated at square (geometry). ...
The symmetry group of a geometric figure is the group of congruencies under which it is invariant, with composition as the operation. ...
In geometry, polyhedra are associated into pairs called duals, where the vertices of one correspond to the faces of the other. ...
In mathematics, an object is convex if for any pair of points within the object, any point on the straight line segment that joins them is also within the object. ...
Geometry (from the Greek words Geo = earth and metro = measure) is the branch of mathematics first popularized in ancient Greek culture by Thales (circa 624-547 BC) dealing with spatial relationships. ...
Geometric shape created by connecting a polygonal base to an apex A pyramid is a geometric shape formed by connecting a polygonal base and a point, called the apex, by triangular faces. ...
A square as a geometric shape is described and illustrated at square (geometry). ...
The Elongated square gyrobicupola, a Johnson solid A Johnson solid is a convex polyhedron each face of which is a regular polygon, which is not a Platonic solid, Archimedean solid, prism or antiprism. ...
The 92 Johnson solids were named and described by Norman Johnson in 1966. Norman Lloyd Johnson was born in Ilford Essex, England, in 1917. ...
1966 was a common year starting on Saturday (link goes to calendar) // Events January January 1 - In a coup, Colonel Jean-Bédel Bokassa ousts president David Dacko and takes over the Central African Republic. ...
It is worth noting that the Johnson solid "square pyramid" is specifically the one square pyramid whose triangular sides are all equilateral triangles. Other square pyramids, such as the Great Pyramid of Giza, are not similar to the Johnson solid; the pyramid at Giza, for example, has isosceles sides of base 756 feet and slant height 719 feet. (That pyramid has the interesting property that the area of each triangular face is equal to the square of its height.) For alternate meanings, such as the musical instrument, see triangle (disambiguation). ...
The Great Pyramid of Giza (29° 58′ 45″ N 31° 08′ 01″ E) is the oldest and last remaining of the Seven Wonders of the World and the most widely recognized pyramid in the world. ...
Several equivalence relations in mathematics are called similarity. ...
For alternate meanings, such as the musical instrument, see triangle (disambiguation). ...
Lenght of a side: a Area:(2*3^0,5+1)*a^2
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