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First solution in Clear category for [old] The Angles of a Triangle by tsuyoshi.suenaga
"use strict";
function triangleAngles(a, b, c){
var r = (a,b,c) => Math.round(Math.acos((b*b+c*c-a*a)/(2*b*c)) * 180 / Math.PI);
var result = [r(a,b,c) || 0, r(b,c,a) || 0, r(c,a,b) || 0].map(c=>c==180?0:c).sort((a,b)=>a-b);
return result
}
var assert = require('assert');
if (!global.is_checking) {
assert.equal(triangleAngles(4, 4, 4), [60, 60, 60], "All sides are equal");
assert.equal(triangleAngles(3, 4, 5), [37, 53, 90], "Egyptian triangle");
assert.equal(triangleAngles(2, 2, 5), [0, 0, 0], "It's can not be a triangle");
console.log("Coding complete? Click 'Check' to review your tests and earn cool rewards!");
}
Dec. 26, 2016
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