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triangle.hpp
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triangle.hpp
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#pragma once
#include "angle.hpp"
#include <string>
class RightAngledTriangle;
/// Models a triangle with sides @c a, @c b, and @c.
class Triangle
{
public:
/// Construct triangle with sides @c a, @c b, and @c c.
Triangle(double a, double b, double c);
/// Construct triangle with sides @c a and @c b, and angle @c C.
static Triangle with_a_b_C(double a, double b, const Angle & C);
/// Construct triangle with angles @c A and @c B, and side @c C.
static Triangle with_A_B_c(const Angle & A, const Angle & B, double c);
/// Split triangle into right-angled triangle.
/// @return New right-angled triangle with angle @c A and hypotenuse @c b.
RightAngledTriangle subA() const;
/// Split triangle into right-angled triangle.
/// @return New right-angled triangle with angle @c B and hypotenuse @c a.
RightAngledTriangle subB() const;
/// @return double Angle @c A (which is opposite side @c a).
Angle A() const;
/// @return double Angle @c B (which is opposite side @c b).
Angle B() const;
/// @return double Angle @c C (which is opposite side @c c).
Angle C() const;
/// @return double Length of opposite side @c a.
double a() const;
/// @return double Length of adjacent side @c b.
double b() const;
/// @return double Length of hypotenuse @c c.
double c() const;
/// @return std::string Description.
std::string description() const;
private:
Angle A_;
Angle B_;
Angle C_;
double a_;
double b_;
double c_;
};