A5/IsoscelesTriangle.cpp

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#include "IsoscelesTriangle.h"
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#include "GeometryUtils.h"
bool IsoscelesTriangle::validate() {
double sideOne = calculate_distance(mVertices[0], mVertices[1]);
double sideTwo = calculate_distance(mVertices[1], mVertices[2]);
double sideThree = calculate_distance(mVertices[2], mVertices[0]);
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// Isosceles triangles must (a) Be a triangle and (b) Have two sides that
// equal each other
return lengths_make_triangle(sideOne, sideTwo, sideThree) &&
(double_eq(sideOne, sideTwo) || double_eq(sideTwo, sideThree) ||
double_eq(sideThree, sideOne));
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}