18 lines
453 B
Dart
18 lines
453 B
Dart
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extension on List<num> {
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bool get isTriangle {
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sort();
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return length == 3 && this[0] + this[1] > this[2];
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}
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}
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class Triangle {
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bool equilateral(double a, double b, double c) =>
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[a, b, c].isTriangle && {a, b, c}.length == 1;
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bool isosceles(double a, double b, double c) =>
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[a, b, c].isTriangle && {a, b, c}.length <= 2;
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bool scalene(double a, double b, double c) =>
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[a, b, c].isTriangle && {a, b, c}.length == 3;
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}
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