Diego Velázquez used pyramid configuration in las meninas.
In the one-point perspective type of linear perspective, an artist generates complete views using lines that converge horizontally.
Vertical lines go from the top of the page to the bottom and are perpendicular to the bottom edge of the picture, along with horizontal lines they make up a one-point perspective drawing.
Linear perspective is a system that creates the illusion of depth on a plane. All parallel lines (orthogonal lines) in paintings and drawings using this system converge to his one vanishing point on the horizontal line of the composition.
Most commonly, this line can be a corner of a building, as a two-point linear perspective is used to depict buildings and interiors. This line is drawn between the two vanishing points and can cross the horizon. Then a receding line is drawn from each end of the corner to each vanishing point.
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The nickelodeon was a type of indoor exhibition space that was dedicated to showing projected motion pictures. These can be considered the beginnings of cinemas. Nickelodeons were cheap (they charged a nickel) and were particularly popular in the early and mid 1900s. This was due to several advantages.
First of all, nickelodeons were very affordable, which made them appealing to a wide audience. This came at a time when the urban middle class was rising. Moreover, these theatres offered a continuous selection of short films, which meant that they provided leisure activities at almost any time. The owners relied on "film exchanges" to have access to a wide variety of new films. This meant that the same audiences would keep coming back, as the content provided was new. This was a great advantage to the patron.
Sorry but this is a math question..
Not an arts question.