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The axis of a cone is the straight line passing through the apex about which the cone has a circular symmetry. In common usage in elementary geometry, cones are assumed to be right circular, i.e., with a circle base perpendicular to the axis. [1] If the cone is right circular the intersection of a plane with the lateral surface is a conic section.
The area of an annulus is the difference in the areas of the larger circle of radius R and the smaller one of radius r: = = = (+) (). As a corollary of the chord formula, the area bounded by the circumcircle and incircle of every unit convex regular polygon is π /4
The bare term cylinder often refers to a solid cylinder with circular ends perpendicular to the axis, that is, a right circular cylinder, as shown in the figure. The cylindrical surface without the ends is called an open cylinder. The formulae for the surface area and the volume of a right circular cylinder have been known from early antiquity.
The Southern Cone (Spanish: Cono Sur, Portuguese: Cone Sul) is a geographical and cultural subregion composed of the southernmost areas of South America, mostly south of the Tropic of Capricorn. Traditionally, it covers Argentina, Chile, and Uruguay, bounded on the west by the Pacific Ocean and on the east by the Atlantic Ocean.
The Cono Sur or Lima Sur (South Lima in english) is one of the five areas that make up the Lima Metropolitan Area. It is located in the southern part of the metropolis hence its name. This socioeconomic levels of this district are varied. Most of the population however belongs to the lower and middle classes.
Recto Avenue just west of Rizal Avenue in Santa Cruz. What is known today as Recto Avenue was developed in sections during Spanish rule.The main section leading to the coast in San Nicolas and Tondo from Binondo was named Paseo de Azcárraga, after the Spanish Filipino Prime Minister of Spain, Marcelo Azcárraga.
Recto comes from a political family. His grandfather, the late nationalist and statesman Claro M. Recto, was a Senator for several terms. His father, Atty. Rafael Recto (d. 2008), was an Assemblyman during the Regular Batasang Pambansa while his older brother, Ricky Recto, was the former vice governor of the province of Batangas.