what is the meaning of radius of a circle?
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What Is Circle? Circle is the locus of points equidistant from a given point, the center of the circle. The common distance from the center of the circle to its points is called radius. Thus a circle is completely defined by its center (O) and radius (R): C(O, R) = O(R) = {x: dist(O, x) = R}.
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The Pythagorean Theorem Circle with a center of (2, -1) and a radius of 4. Definition : A circle is the set of all points that are the same distance, r, from a fixed point. General Formula: X 2 + Y 2=r2 where r is the radius. Unlike parabolas, circles ALWAYS have X 2 and Y 2 terms. X2 + Y2=4 is a circle with a radius of 2 (since 4 =22)
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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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What is a radius? Radius of a circle Radius of a Circle. The radius of a circle is the distance from the center point to the edge of the circle. It's the same distance anywhere on the circle, because the circle has radial symmetry. So it doesn't matter where you measure the radius on the circle, and if you know one radius measurement for a circle, then you know all of them. Try it for yourself and see!
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What is Pi? Although pi is defined in terms of the diameter of a circle, in mathematical formulae, it is normally the radius, represented by r, that is used, so that the formula for the circumference of a circle is 2πr, or radius multiplied by π times two.
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- Cut that in half-that is the radius. The radius is the … distance from the center to the edge of the circle. A radius is one half the diameter of a circle (the straight line distance from one point of the edge of a circle to the other side, directly in the middle).The plural form of radius is radii.+ 7 others found this useful.he radius is the … distance from the center to the edge of the circle. A radius is one half the diameter of a circle (the straight line distance from one point of the edge of a circle to the other side, directly in the middle). The plural form of radius is radii. + 7 others found this useful.
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- The circumference (from Latin circumferentia, meaning carrying around) of a closed curve or circular object is the linear distance around its edge. The circumference of a circle is of special importance in geometry and trigonometry.
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The Pythagorean Theorem Definition of Circle. Definition: A circle is the set of all points that are the same distance, r, from a fixed point. General Formula: X 2 + Y 2 =r 2 where r is the radius. 1  Unlike parabolas, circles ALWAYS have X 2 and Y 2 terms. 2  X2 + Y2=4 is a circle with a radius of 2 (since 4 =22). 3  Remember that a circle is a locus of points.
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Circumference Circumference of a circle[edit] Circle illustration with circumference (C) in black, diameter (D) in cyan, radius (R) in red, and centre or origin (O) in magenta. Circumference = π × diameter = 2 × π × radius. The circumference of a circle is the distance around it. The term is used when measuring physical objects, as well as when considering abstract geometric forms. When a circle's diameter is 1, its circumference is π. When a circle's radius is 1—called a unit circle—its circumference is 2π.
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- A circle is the locus of all points a fixed distance from a given (center) point. This definition assumes the plane is composed of an infinite number of points and we select only those that are a fixed distance from the center. (See locus definition .).
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- 1 Diameter — a special chord that passes through the centre of the circle. A diameter is a straight line segment from one point on the circumference to another point on the circumference that passes through the centre of the circle.  Segment — part of the circle that is cut off by a chord.
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- circle noun [ C ] (SHAPE) › geometry a continuous curved line which is always the same distance away from a fixed central point, or the area enclosed by such a line: Colored paper was cut into circles, squares, and triangles. A circle of chairs had been arranged in the center of the room.
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RADIUS (radii) radius-the length of a line segment between the center and circumference of a circle or sphere. r. diam, diameter-the length of a straight line passing through the center of a circle and connecting two points on the circumference.
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- The circle is such a common shape that we take it for granted ... but there is more to it that just a common shape. Mathematically, the circle is defined as the set of all points that are the same distance from a given point, called the center. That distance is called the radius. The word radius comes from the Latin word for rod or spoke of a wheel, and the radii, or spokes, radiate out from the center.
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Diameter Circle with circumference (C) in black, diameter (D) in cyan, radius (R) in red, and centre or origin (O) in magenta. In geometry, a diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. It can also be defined as the longest chord of the circle. Both definitions are also valid for the diameter of a sphere.
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- The Solemnity of Cristo Rey is Sunday November 26, and we will have the regular schedule of masses. Plan on joining us for the festival here from 8:00am until 4:00pm. There will be a variety of food booths and music.
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Parts of Circles If we draw a line from center of the circle to the boundary of the circle,(which we call the circumference of the circle), then the length of this line is called the radius of the circle. The radius remains of fixed length, from where ever we draw it. Sector, arc, radii, diameter are parts of circle. If we join the two radius, which moves in the opposite direction from the center of the circle is called the Diameter of the circle, which is a part of a circle. We observe that two radius join to form a diameter, so we say that the diameter = radius * 2.
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RADIUS (radii) Definition of radius of curvature. : the reciprocal of the curvature of a curve.
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- ra•di•us. 1. a straight line extending from the center of a circle or sphere to the circumference or surface: The radius of a circle is half the diameter. 2. the length of such a line. 3. any radial or radiating part.. A line segment that joins the center of a circle or sphere with any point on the circumference of the circle or the surface of the sphere. It is half the length of the diameter. 2.
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Arc Of A Circle Definition of Arc of a Circle. The arc of a circle is a portion of the circumference of a circle. Measure an arc by two methods: 1) the measure of the central angle or 2) the length of the arc itself. Measure of the central angle: The XZ arc measures 120°.
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Geometry Symbols Circle. A circle is a simple shape of Euclidean geometry that is the set of all points in a plane that are at a given distance from a given point, the centre. The distance between any of the points and the centre is called the radius.It can also be defined as the locus of a point equidistant from a fixed point. Read more ». circle is a simple shape of Euclidean geometry that is the set of all points in a plane that are at a given distance from a given point, the centre. The distance between any of the points and the centre is called the radius. It can also be defined as the locus of a point equidistant from a fixed point. Read more ».
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What Is Circle? where (x 0, y 0) is the center of the circle and R its radius. The polar coordinates of a circle centered at the origin are particularly simple: r = R. A segment of a line joining two points on a circle is called a chord; a piece of a circle between two points is an arc.
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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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- Example of Center of a Circle. 1  The constant distance from the center of the circle to any point on the circle is called the radius of the circle. 2  Diameter of a circle is the line segment connecting two points on a circle and passing through the center of the circle.
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- “The radius is that line extending from the center of the circle to its exterior,” says Stone, “and in a lot of ways this album is about getting out things deep inside—whether it’s love or insecurity or joy or frustration about things going on today.”.
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Circumference of a Circle The radius of a circle is the distance from the center of a circle to any point on the circle. If you place two radii end-to-end in a circle, you would have the same length as one diameter. the points INSIDE the circle.