*The relationship between chord length (C) and radius (r) in a circle is given by the formula: C = 2r * sin(θ/2). This formula allows you to calculate the chord length when you know the radius and the central angle (θ) or vice versa. Chord length is directly proportional to the radius and the central angle.*

## Chord Length to Radius Calculator

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## FAQs

**What is the relationship between chord length and radius?** The relationship between chord length (C), radius (r), and the central angle (θ) is given by the formula: **C = 2r * sin(θ/2)**.

**How do you find the radius when given the chord length?** To find the radius (r) when given the chord length (C) and the central angle (θ), you can rearrange the chord length formula: **r = C / (2 * sin(θ/2))**.

**Are chords equal to radius?** No, chords are not equal to the radius. A chord is a line segment that connects two points on the circle’s circumference, whereas the radius is a line segment that connects the center of the circle to a point on the circumference. Chord lengths can vary, but the radius is a fixed length for a given circle.

**How to find the radius of a circle from chord length and arc length?** You cannot find the radius of a circle solely from the chord length and arc length. You would need additional information, such as the central angle, to calculate the radius.

**What is the distance of a chord with length r of a circle?** If the length of a chord is equal to the radius (C = r), it means the chord subtends a 60-degree central angle at the center of the circle. In this case, you can calculate the distance from the center to the midpoint of the chord using the formula: **d = (r * √3) / 2**.

**What is the chord radius theorem?** The chord radius theorem states that in a circle, if two chords are equal in length, then the distances of these chords from the center of the circle are also equal.

**What is the formula for chords?** The formula for calculating the length of a chord in a circle is: **C = 2r * sin(θ/2)**, where C is the chord length, r is the radius, and θ is the central angle in radians.

**What is the rule for chords in a circle?** There isn’t a specific “rule” for chords in a circle, but there are formulas and theorems that relate chord length, radius, and central angles as mentioned earlier.

**How to find the radius of a circle?** To find the radius of a circle, you need more information than just the chord length. Typically, you would need either the diameter, the circumference, or additional geometric information to calculate the radius.

**Is the radius of a circle a chord of the circle?** No, the radius of a circle is not a chord of the circle. A chord is a line segment connecting two points on the circle’s circumference, while the radius is a line segment from the center of the circle to a point on the circumference.

**What is the longest chord of a circle equal to its radius?** The longest chord of a circle is the diameter, and its length is equal to twice the radius. So, if the radius is ‘r,’ the longest chord (diameter) is ‘2r.’

**Is a chord in a circle always perpendicular to radius?** No, a chord in a circle is not always perpendicular to the radius. Whether a chord is perpendicular to a radius depends on its placement within the circle and the specific geometric configuration.

**What is the 1 3 5 rule for chords?** The “1-3-5 rule” typically refers to the lengths of chords in a circle. It suggests that if you have three chords in a circle, one-third of the chords will be longer than the radius, one-third will be shorter than the radius, and one-third will be equal to the radius.

**What is the rule for chords in math?** In math, the rule for chords in a circle is mainly described by the chord length formula: **C = 2r * sin(θ/2)**, where C is the chord length, r is the radius, and θ is the central angle in radians.

**What is the relationship between a diameter and a chord?** A diameter of a circle is a specific type of chord that passes through the center of the circle, dividing it into two equal halves. It is the longest possible chord in a circle and is equal in length to twice the radius.

**What are the rules for chords and diameter?** The main rule for chords and the diameter is that the diameter is the longest possible chord in a circle, and its length is equal to twice the radius.

**How many chords are determined by 7 points on a circle?** If you have 7 points on a circle, you can determine 21 chords by connecting pairs of these points. This is calculated using combinations: C(7, 2) = 7! / (2!(7-2)!) = 21.

**Is a chord always a diameter?** No, a chord is not always a diameter. A diameter is a specific type of chord that passes through the center of the circle, but other chords do not necessarily pass through the center.

**How do you find the radius of a circle with two chords?** To find the radius of a circle with two chords, you would need additional information such as the lengths of the chords, the central angles they subtend, or other geometric properties of the circle. Two chords alone are not sufficient to determine the radius.

**How do you find the radius of a circle without the diameter?** You can find the radius of a circle without knowing the diameter by using other information such as the circumference, the area, or the lengths of chords and their corresponding central angles.

**How do you find radius from circumference?** To find the radius from the circumference (C) of a circle, you can use the formula: **r = C / (2π)**.

**What is the longest chord in a circle of radius 5 cm?** The longest chord in a circle with a radius of 5 cm is the diameter, which is equal to twice the radius, so it would be 10 cm long.

**How long is the longest chord in a circle of radius 2006?** The longest chord in a circle with a radius of 2006 units would be twice the radius, so it would be 4012 units long.

**What is the radius of a circle if the length of the longest chord is 20 cm?** If the length of the longest chord is 20 cm, it means the diameter of the circle is 20 cm. Therefore, the radius would be half of that, which is 10 cm.

**What is the circle theorem 1?** Circle theorem 1 is a general term that does not refer to a specific theorem. Circle theorems typically involve relationships and properties of angles, chords, and segments in a circle, and they are numbered differently in various sources.

**What is the 2 chords rule?** The “2 chords rule” is not a commonly recognized term in geometry. It might refer to a specific concept or theorem, but without further context, it’s unclear.

**What is the three-chord trick?** The “three-chord trick” is not related to geometry or circles. It is often used in music theory to describe songs that can be played using just three basic chords, typically the I, IV, and V chords in a given key.

**What are the 3 most important chords in correct order?** In music theory, the three most important chords in a given key are usually the I (tonic), IV (subdominant), and V (dominant) chords. These chords form the basis of many songs and musical compositions.

**How many chord formulas are there?** There are several chord-related formulas in geometry, but the primary one is the chord length formula: **C = 2r * sin(θ/2)**. Other formulas might involve chord properties in relation to angles and segments in a circle.

**How many chords can pass through a circle?** Infinitely many chords can pass through a circle, as long as each chord connects two distinct points on the circumference of the circle.

**Are all chords equal in length?** No, not all chords in a circle are equal in length. Chord lengths can vary depending on their positions and the angles they subtend.

**Can a chord be longer than a diameter?** No, a chord cannot be longer than the diameter of a circle. The diameter is the longest possible chord in a circle.

**Why is diameter the longest chord?** The diameter is the longest chord in a circle because it passes through the center of the circle and, therefore, has the maximum possible length.

**Why a diameter is a chord but a radius is not?** A diameter is considered a chord because it connects two points on the circumference of a circle, just like any other chord. However, a radius is not considered a chord because it connects the center of the circle to a point on the circumference, and it is a fixed length for that circle.

**Are there rules for chords?** Yes, there are rules and formulas for chords in geometry, which involve their lengths, angles, and relationships with the circle’s properties.

**What is the rule of the 7 chords?** There isn’t a specific “rule of the 7 chords” in geometry or mathematics. The number of chords and their properties in a circle depend on the number of points chosen on the circle’s circumference.

**How do you construct a diameter with a chord?** To construct a diameter with a chord, draw a chord anywhere on the circle. Then, draw two radii from the center of the circle to the endpoints of the chord. The line segment formed by these two radii is the diameter.

**How many places does a chord meet the circumference?** A chord meets the circumference of a circle at two points. These points are the endpoints of the chord.

**How many chords from 6 points on a circle?** If you have 6 points on a circle, you can determine 15 chords by connecting pairs of these points. This is calculated using combinations: C(6, 2) = 6! / (2!(6-2)!) = 15.

**What does 7 mean at the end of a chord?** The number “7” at the end of a chord doesn’t have a specific mathematical meaning in the context of chords in a circle. It might be used as a label or identifier for a particular chord but doesn’t carry inherent mathematical significance.

**Can a chord be shorter than a radius?** Yes, a chord can be shorter than a radius. The length of a chord depends on its position and the angle it subtends, so it can vary in length. A radius, on the other hand, is a fixed length from the center to the circumference.

**What is the relationship between radius and chord length?** The relationship between radius and chord length is defined by the chord length formula: **C = 2r * sin(θ/2)**, where C is the chord length, r is the radius, and θ is the central angle in radians.

**How do you find the radius of a chord length and angle?** To find the radius of a circle given the chord length (C) and the central angle (θ), you can use the formula: **r = C / (2 * sin(θ/2))**.

**Can you find the radius without the circumference?** Yes, you can find the radius of a circle without knowing the circumference if you have other relevant information, such as the chord length and central angle, or the area of the circle.

**What is the formula for radius to diameter?** The formula for calculating the radius (r) from the diameter (d) is: **r = d / 2**.

**How to find the radius of a circle with the circumference and diameter?** If you know both the circumference (C) and the diameter (d) of a circle, you can calculate the radius using the formula: **r = d / 2 = C / (2π)**.

**What is the length of the radius compared to the diameter?** The length of the radius is half the length of the diameter. In mathematical terms, it can be expressed as: **r = d / 2**.

**How to find the radius of a circle with a circumference of 28 pi?** If the circumference (C) is given as 28π, you can find the radius using the formula: **r = C / (2π) = (28π) / (2π) = 14 units**.

**How long will the longest chord be if the radius is 10 cm long?** The longest chord in a circle, which is the diameter, will be twice the length of the radius. So, if the radius is 10 cm, the longest chord will be 20 cm.

**Is the chord longer than the radius?** In general, a chord can be longer or shorter than the radius, depending on its position and the central angle it subtends.

**What is the length of the longest chord of a circle with radius 7 cm?** The length of the longest chord in a circle with a radius of 7 cm is 14 cm, as it is equal to twice the radius.

**What is the formula for the length of the longest chord of a circle?** The formula for the length of the longest chord of a circle is: **C = 2r**, where C is the chord length and r is the radius.

**How I measure the longest chord of a circle?** To measure the longest chord of a circle, simply measure the distance between any two points on the circumference that are diametrically opposite (passing through the center). This measurement will give you the length of the longest chord, which is the diameter.

**What is the length of the longest chord of the circle if the radius of the circle is 5.2 cm?** If the radius of the circle is 5.2 cm, then the length of the longest chord (the diameter) is 2 times the radius, which is 2 * 5.2 cm = 10.4 cm.

**What is the length of the longest chord of a circle with radius 2.6 cm?** If the radius of the circle is 2.6 cm, then the length of the longest chord (the diameter) is 2 times the radius, which is 2 * 2.6 cm = 5.2 cm.

**What are the 7 circle theorems?** There are various circle theorems in geometry that deal with angles, segments, and properties of circles. They are typically labeled and numbered differently in different sources, and there isn’t a universally recognized set of “7 circle theorems.”

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