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Add an algorithm to find length of an arc and area of the sector formed by an arc of a circle #1119

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Merged
raklaptudirm merged 6 commits into from
Oct 8, 2022
Merged

Add an algorithm to find length of an arc and area of the sector formed by an arc of a circle #1119

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49dd1eb
Add an algorithm to find length and area of an arc of a circle
prashalruchiranga Oct 3, 2022
0de33fa
Updated to follow Javascript Standard Style
prashalruchiranga Oct 3, 2022
59663e9
Update CircularArc.js
prashalruchiranga Oct 3, 2022
2be2bce
Update CircularArc.js
prashalruchiranga Oct 3, 2022
83259b3
Add tests
prashalruchiranga Oct 7, 2022
d50e160
Followed Javascript standard style
prashalruchiranga Oct 7, 2022
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31 changes: 31 additions & 0 deletions Maths/CircularArc.js
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Original file line number Diff line number Diff line change
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import { degreeToRadian } from './DegreeToRadian.js'

/**
* @function circularArcLength
* @description calculate the length of a circular arc
* @param {Integer} radius
* @param {Integer} degrees
* @returns {Integer} radius * angle_in_radians
* @see https://en.wikipedia.org/wiki/Circular_arc
* @example circularArcLength(3, 45) = 2.356194490192345
*/
function circularArcLength (radius, degrees) {
return radius * degreeToRadian(degrees)
}
/**
* @function circularArcArea
* @description calculate the area of the sector formed by an arc
* @param {Integer} radius
* @param {Integer} degrees
* @returns {Integer} 0.5 * r * r * angle_in_radians
* @see https://en.wikipedia.org/wiki/Circular_arc
* @example circularArcArea(3,45) = 3.5342917352885173
*/
function circularArcArea (radius, degrees) {
return Math.pow(radius, 2) * degreeToRadian(degrees) / 2
}

export {
circularArcLength,
circularArcArea
}
19 changes: 19 additions & 0 deletions Maths/test/CircularArc.test.js
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import { circularArcLength, circularArcArea } from '../CircularArc'

describe('circularArcLength', () => {
it('with natural number', () => {
const arcLengthOfOneThirty = circularArcLength(1, 30)
const arcLengthOfThreeSixty = circularArcLength(3, 60)
expect(arcLengthOfOneThirty).toBe(0.5235987755982988)
expect(arcLengthOfThreeSixty).toBe(3.141592653589793)
})
})

describe('circularArcArea', () => {
it('with natural number', () => {
const arcAreaOfOneThirty = circularArcArea(1, 30)
const arcAreaOfThreeSixty = circularArcArea(3, 60)
expect(arcAreaOfOneThirty).toBe(0.2617993877991494)
expect(arcAreaOfThreeSixty).toBe(4.71238898038469)
})
})