what is diameter of a circle
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Diameter 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. In more modern usage, the length of a diameter is also called the diameter. In this sense one speaks of the diameter rather than a diameter (which refers to the line itself), because all diameters of a circle or sphere have the same length, this being twice the radius r.
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What is the difference between a circle and the circumference of a circle? Circle is the geometric figure shaped in the form of a round plane whose boundary consists of points equidistant from a fixed point called the centre. Circumference of a circle is the linear distance of the boundary (or edge) of a circle.
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The Geometry of Circles The circumference of a circle (the perimeter of a circle): The circumference of a circle is the perimeter -- the distance around the outer edge. Circumference = where r = the radius of the circleand pi = 3.141592...
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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. Thus, the diameter of a circle is twice as long as the radius.
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What Is Pi? The circumference of a circle is its perimeter or the length around it. The distance from the center of a circle to its edge is the radius. The distance from one side of a circle to the opposite side (twice the radius) is the diameter. The area of a circle is the number of square units inside the circle.
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Circle The radius is the distance from the center of the circle to its edge. For example, if the radius of the circle is 4 cm, then the diameter of the circle is 4 cm x 2, or 8 cm. 2. If you know the circumference of the circle, divide it by π to get the diameter. π is equal to approximately 3.14 but you should use your calculator to get the most accurate results. For example, if the circumference of the circle is 10 cm, then the diameter is 10 cm/π, or 3.18 cm. 3. If you know the area of the circle, divide the result by π and find its square root to get the radius; then multiply by 2 to get the diameter.
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Math Terms: Measurement Circumference Of A Circle. This may be calculated from its diameter using the formula: c = πd or substituting the radius for the diameter: c = 2πr where r is the radius and d is the diameter of the circle, and π (the Greek letter pi) is the constant 3.141 592. Diameter.
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- Use 3.14 for pi.To find the circumference of a circle, use the formula pi x diameter = circumference .This formula is often written as C = π x d .The circle pictured here has a diameter of 10 cm. d = 10 cm π ≈ 3.1410 cm x 3.14 = 31.4 cm 10 cm6 cm a. b. 7 m c. 4 km d. 9 in.
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How to work out the diameter, circumference or radius of a curcle? ? Report Abuse. The diameter is a line that passes through the center of a circle, and whose endpoints are on the circle (Wkipedia) In the drawing you described d is the diameter. So d = 6cm The radius is half of the diameter (It is defined as the line from the center to the edge of the circle.In your case r = (1/2)6 = 3cm The circumference is the length of a the line forming the circle.eport Abuse. The diameter is a line that passes through the center of a circle, and whose endpoints are on the circle (Wkipedia) In the drawing you described d is the diameter. So d = 6cm The radius is half of the diameter (It is defined as the line from the center to the edge of the circle.
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- Calculating the Diameter of a Circle Using the Radius, Circumference, or Area. 1. If you know the radius of the circle, double it to get the diameter. The radius is the distance from the center of the circle to its edge. For example, if the radius of the circle is 4 cm, then the diameter of the circle is 4 cm x 2, or 8 cm. 2. If you know the circumference of the circle, divide it by π to get the diameter.
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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.
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Diameter Calculator On our site and in all of our calculators, 3.14159 is the value we use, unless otherwise specified. The purpose of this calculator demonstration is to use PI and the circumference of a circle to find the diameter of that circle. To use this calculator, begin by entering the circumference of a given circle and PI. Click on the Calculate button for the returned calculated value of the dimeter, thus proving it.
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- is the ratio of a circle's circumference to its diameter (π = c / d) which also means that the circumference of a circle is Pi times its diameter (c = πd) or twice Pi times its radius (c = 2πr).
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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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ANSWER KEY The radius of the circle, equal to one-half of its diameter,  is any line that goes from the center of the circle to any point on  the circle. 2 people found this useful.he radius of the circle, equal to one-half of its diameter,  is any line that goes from the center of the circle to any point on  the circle. 2 people found this useful.
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Perimeter The perimeter of a circle, often called the circumference, is proportional to its diameter and its radius. That is to say, there exists a constant number pi, π (the Greek p for perimeter), such that if P is the circle's perimeter and D its diameter then: In terms of the radius r of the circle, this formula becomes:
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The Geometry of Circles The radius of a circle is the distance from the center of the circle to the outside edge. The diameter of a circle: The diameter of a circle is longest distance across a circle. (The diameter cuts through the center of the circle. This is what makes it the longest distance.) The circumference of a circle (the perimeter of a circle): The circumference of a circle is the perimeter -- the distance around the outer edge. Circumference =. where r = the radius of the circle.
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- Confidence votes 27.1K. The circumference of a circle is 2πr where r is the radius or πd where d is the diameter. The circumference of the apple pie divided by its diameter is πd/d = π. 1 person found this useful.
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How do I find the diameter and circumference of a circle? Figure 3. The perimeter of a circle is described as its circumference. That's the distance around the entire circle. If you divide the circumference by the diameter, you get a value called Pi. Figure 4. Pi is pronounced the same as the PIE you eat. The symbol used to represent Pi doesn't look as tasty.
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Circumference Relationship with Pi Edit. The circumference of a circle relates to one of the most important mathematical constants in all of mathematics. This constant, pi, is represented by the Greek letter π. The numerical value of π is 3.14159 26535 89793 ...
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- The number is the ratio of the circumference of a circle to its diameter. The value of is approximately 3.14159265358979323846...The diameter of a circle is twice the radius. Given the diameter or radius of a circle, we can find the circumference.
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How Do You Find the Diameter of a Circle? Input the variables of the equationReplace the equation d=C/pi by switching C with 18.8754 and substituting 3.1459 for pi. This gives the equation d=18.8754/3.1459, or the diameter is 18.8754 divided by 3.1459.Solve the equationDivide the numbers to discover the diameter of this particular circle is 6 inches.
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Diameter The diameter of a circle is the distance from a point on the circle to a point radians away, and is the maximum distance from one point on a circle to another. The diameter of a sphere is the maximum distance between two antipodal points on the surface of the sphere.
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True Position If you only have the diameter of a circle, convert it to the radius. Do not try to find area until you convert the diameter to the radius. A radius is half the length of the diameter. Divide the diameter by 2 to get the radius, for example: A circle with a diameter of 10 would have a radius of 5.A circle with a diameter of 1,050 would have a radius of 525. radius is half the length of the diameter. Divide the diameter by 2 to get the radius, for example: A circle with a diameter of 10 would have a radius of 5.
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- For example, if the circumference of the circle is 10 cm, then the diameter is 10 cm/π, or 3.18 cm. 3. If you know the area of the circle, divide the result by π and find its square root to get the radius; then multiply by 2 to get the diameter.
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How to Calculate the Circumference of a Circle In this equation, C represents the circumference of the circle, and d represents its diameter. That is to say, you can find the circumference of a circle just by multiplying the diameter by pi. Plugging π into your calculator will give you its numerical value, which is a closer approximation of 3.14.