names of different parts of a circle
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Circle Lines. A line that goes from one point to another on the circle's circumference is called a Chord. If that line passes through the center it is called a Diameter. A line that just touches the circle as it passes by is called a Tangent. And a part of the circumference is called an Arc.ecause people have studied circles for thousands of years special names have come about. Nobody wants to say that line that starts at one side of the circle, goes through the center and ends on the other side when a word like Diameter will do.
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Circumscribed and Inscribed Circles Create a triangle. Given any triangle, it is always possible to find a circle such that all the vertices of the triangle lie on the circle. This is the so called circumscribed circle. Use one of the points shown above as the midpoint of the circle. This point is called the circumcenter of the triangle.
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Circle The centre of a circle is the point in the very middle. The radius of a circle is a line from the centre of the circle to a point on the side. All points on the edge of the circle are at the same distance from the centre. In other words, the radius is the same length all the way around the circle. Mathematicians use the letter r for the length of a circle's radius.
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Pi The diameter is the longest straight line which can be fitted inside a circle. It passes through the center of the circle. The distance around a circle is known as the circumference. Even though the diameter and circumference are different for different circles, the number pi remains constant: its value never changes. This is because the relationship between the circumference and diameter is always the same.
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- pi (): A number, 3.141592..., equal to (the circumference) / (the diameter) of any circle. radius: distance from center of circle to any point on it. sector: is like a slice of pie (a circle wedge). tangent of circle: a line perpendicular to the radius that touches ONLY one point on the circle.
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The Geometry of a Circle The circumference of a circle is its perimeter or distance around it. It is denoted by C in math formulas and has units of distance, such as millimeters, centimeters, meters, or inches. The circumference of a circle is the measured total length around a circle, which when measured in degrees is equal to 360°. Pi (p) is the fixed ratio used to calculate the circumference of the circle. p is equal to 3.14.
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Concentric Circles Concentric circles are circles with a common center. The region between two concentric circles of different radii is called an annulus. Any two circles can be made concentric by inversion by picking the inversion center as one of the limiting points.
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Equation of a Circle 1 X2 + Y2=4 is a circle with a radius of 2 (since 4 =22)  Remember that a circle is a locus of points. A circle is all of the points that are a fixed distance, known as the radius, from a given point, known as the center of the circle.
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- Difference between 'infinite' and 'not finite' [closed] In a chat on Mathematics.SE about countability of infinite sets, someone responded that regarding the 'counting', infinite in mathematics does not mean uncountable, but means 'not finite'.
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Concentric Circles Concentric circles are circles with a common center. The region between two concentric circles of different radii is called an annulus. Any two circles can be made concentric by inversion by picking the inversion center as one of the limiting points.oncentric circles are circles with a common center. The region between two concentric circles of different radii is called an annulus. Any two circles can be made concentric by inversion by picking the inversion center as one of the limiting points.
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Conic Sections The distance from the center to any point on the circle is the radius of the circle, and a segment containing the center whose endpoints are both on the circle is a diameter of the circle. The radius, r , equals one-half the diameter, d .
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Circumscribed circle If a triangle has two particular circles as its circumcircle and incircle, there exist an infinite number of other triangles with the same circumcircle and incircle, with any point on the circumcircle as a vertex. (This is the n =3 case of Poncelet's porism).
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Construction of the Nine-Point Circle 4. Construct the midpoints of the segments AH, BH, CH. Label them as X, Y, Z. First, notice the nine points, L,M,N,D,E,F,X,Y, Z, lie in a circle. This circle is called the Nine-Point Circle. To find the center of the Nine-Point Circle, construct the circumscribed circle for triangle LMN. Label the center as U. The center of the circumscribed circle for triangle LMN will also be the center of the Nine-Point Circle labeled as U.
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- Arc – part of the circumference (edge) of the circle. The measure of an arc is equal to the measure of. the central angle formed by its endponts. Arcs are named by their endpoints. The dashed arc to the. right would be called arc AB. or arc BA, the order of. the endpoints does not matter.
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- If the circle is divided into two unequal parts, the smaller arc is called the minor arc and the larger arc is called the major arc. Center (of a Circle) - The point inside the circle that is the same distance from all points on the circle.
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Stages & Phases of HIV/AIDS The window period is the time between initial infection and the time that your body produces anti-bodies to the virus. The HIV test doesn't actually test for HIV, but these anti-bodies. Antibodies to the HIV virus will appear within 3 months of infection. During the window period and process of seroconversion someone can be unaware that they have HIV in their system. The bottom line is that we need to get. tested and we need to use condoms.
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Circles Diameter of a circle. \[ \] The diameter of a circle is the length of a line that starts at one point on the circle, passes through the center and ends on another point on the circle's opposite side. It's also referred as the longest chord possible in the circle.
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Basic Geometric Shapes: Square, Circle, Rectangle, and Triangle A circle, on the other hand, has no straight lines. It is a combination of curves all connected. There are no angles to be found in a circle. A rectangle is created by connecting four line segments, in a similar manner to a square. However, a rectangle will typically have two line segments which are longer than the other two line segments.
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- The circle is a highly symmetric shape: every line through the centre forms a line of reflection symmetry and it has rotational symmetry around the centre for every angle. Its symmetry group is the orthogonal group O(2,R). The group of rotations alone is the circle group T. All circles are similar. A circle's circumference and radius are proportional.
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- 2.4 Circles. A circle with center at C and the radius r is the set of all points (x, y) whose distance from C is r. The equation of a circle with center at C(h,k) and radius r is therefore: (x-h)2 + (y-k)2 = r2. This equation is called the standard equation of the circle.
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What is the difference between a circle and the circumference of a circle? Circle is the name of a two-dimensional shape and a one-dimensional curve. The shape has a certain property that any point lying on the shape is always at a constant distance from a point called centre. Circumference is the perimeter of the circle. In other words it is the length of the boundary of circle.
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Parts of Circles Parts of Circles. When we study Geometry, and look at the Circle, we say that the circle is a round figure, which has its boundary at equal distance from a Point called Centre of the circle. If we look at different parts of the circle we use the terms center, radius, arc, diameter, sector and a Chord.
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Calculating the circumference of a circle The distance around a rectangle or a square is as you might remember called the perimeter. The distance around a circle on the other hand is called the circumference (c). A line that is drawn straight through the midpoint of a circle and that has its end points on the circle border is called the diameter (d) Half of the diameter, or the distance from the midpoint to the circle border, is called the radius of the circle (r).
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Circumscribed circleupdate In geometry, the circumscribed circle or circumcircle of a polygon is a circle which passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius. A polygon which has a circumscribed circle is called a cyclic polygon (sometimes a concyclic polygon, because the vertices are concyclic). All regular simple polygons, all triangles and all rectangles are cyclic.
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How to Find the Circumference and Area of a Circle The circumference (C) of a circle is its perimeter, or the distance around it. The area (A) of a circle is how much space the circle takes up. Both can be calculated using the radius or diameter of the circle and the value of pi.
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What Is Half a Circle Called in Geometry? In geometry, the half circle is referred to as the semicircle. The semicircle is made by dividing a whole circle along its diameter. Alternatively, a semicircle could also be an open arc where a curved line represents half a circle's circumference but with no straight diameter line closing its area. Continue Reading.