To one side of the rectangle where the straight line as the rotation axis, the remaining side to form rotated geometry. Called the cylinder axis of rotation axis, the axis is called the length of this side of the high cylindrical, perpendicular to the axis of the side rotating cylinder made of a round face as the bottom, parallel to the axis of rotation becomes the side edge, said the cylinder side. No matter what spin to the location of this boundary is called the cylinder generatrix. Bottom radius r, height h of the cylinder side of the area s = 2πrh, volume v = πr 2h.
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Cylindrical definition
Ab oo'ab rectangle around the other side edge oo 'rotate 360 °, the resulting space is called cylindrical geometry, oo' is called the axis of the cylinder, oo 'is called the height of the cylinder length, all in parallel is called a line segment ab column bus, and two circular oa o'b called rotary cylinder forming the bottom surface, the surface formed by rotating called ab cylinder side.
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Cylindrical surface
Surface area of the cylinder = 2 × base area + lateral area After the start side is a rectangle, the perimeter length is a bottom width is high, so the bottom surface side of the perimeter area × height = Let the radius of a cylindrical bottom surface is r, the height h, the surface area s: s = 2πr ^ 2 +2 πrh = 2πr (r + h)
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The volume of the cylinder
Volume of the cylinder with the cuboid, cube, are base area × height Let the radius of a cylindrical bottom surface is r, the height h, the volume v: v = πr ^ 2h
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Lateral area of the cylinder
The bottom surface of the cylinder side area = perimeter ride high
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The name of the cylindrical portion
Two circular cylindrical surface is called the underside; surface surrounding called side; distance between the two is called the high ground.
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Definition cylinder (column)
1, The line where the rectangular side of the rotary shaft, the remaining three sides surrounded by the rotation surface formed into a cylindrical rotating body called a (circular cylinder), i.e., one side of the rectangle AG axis, 360 ° rotation is obtained in a cylindrical geometry. Wherein AG is called the axis of the cylinder, the cylinder is called the length of AG is high, all in a parallel bus called AG cylindrical segments, and two circular D'G DA rotary cylinder called a bottom formed, DD 'is formed is called the cylindrical surfaces of revolution side. 2, In the same plane has a fixed straight line and a moving line, when the plane of rotation around a fixed straight line of this week, this line of action is called a plane of rotation of the surface, this line is called the axis of rotation of a given surface, which moving line called the plane of rotation of the bus. If the bus is to a line parallel to the shaft, the rotating plane is called cylindrical surface generated. If the two planes perpendicular to the axis of the cylindrical surface cut, and then the two sections surrounded by the cylindrical surface called a straight cylindrical geometry, referred cylinder.
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Cylindrical surface
The surface area of the cylinder, called the surface area of the cylinder. Surface area of the cylinder = 2 × base area + lateral area After the commencement of the cylinder side is a square (rectangle), launched after the long side is a bottom circumference, width is high, so the side area of the underside perimeter × H = Let the radius of a cylindrical bottom surface is r, the height h, the surface area S: S = 2 * S + S bottom side = 2 * πr ² + CH
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The volume of the cylinder
The size of the space occupied by the cylinder, the cylinder is called the volume. The volume of the cylinder with rectangular, cube, are base area × height: _Set_ the bottom surface of a cylinder of radius r, the height h, the volume V: V = πr ^ 2h If S is a bottom area, height h, volume V: v = sh
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The relationship between the cylindrical and conical
Tapered high volume and at the end of the cylinder, such as a third cylinder volume. Equally between volume and high cone and cylindrical, conical bottom area is three times the cylinder. The area between the cone and the bottom is equal to the volume of the cylinder, the cone is three times as high in the cylinder. Does not equal equal cylindrical cone.
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English Expression
: drum, straight pin
n.: column, contracture, solid or hollow curved body with circular ends and straight sides, cylinder
French Expression
n. cylindre
Thesaurus
guanxing, dummy, cast, prototype, embryonic form, original version of a work, prototype, mode cylinder