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diff --git a/fuzzylite/src/term/Triangle.cpp b/fuzzylite/src/term/Triangle.cpp
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+++ b/fuzzylite/src/term/Triangle.cpp
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+/*
+ fuzzylite (R), a fuzzy logic control library in C++.
+ Copyright (C) 2010-2017 FuzzyLite Limited. All rights reserved.
+ Author: Juan Rada-Vilela, Ph.D. <jcrada@fuzzylite.com>
+
+ This file is part of fuzzylite.
+
+ fuzzylite is free software: you can redistribute it and/or modify it under
+ the terms of the FuzzyLite License included with the software.
+
+ You should have received a copy of the FuzzyLite License along with
+ fuzzylite. If not, see <http://www.fuzzylite.com/license/>.
+
+ fuzzylite is a registered trademark of FuzzyLite Limited.
+ */
+
+#include "fl/term/Triangle.h"
+
+namespace fl {
+
+    Triangle::Triangle(const std::string& name, scalar vertexA, scalar vertexB, scalar vertexC, scalar height)
+    : Term(name, height), _vertexA(vertexA), _vertexB(vertexB), _vertexC(vertexC) {
+        if (Op::isNaN(vertexC)) {
+            this->_vertexC = _vertexB;
+            this->_vertexB = 0.5 * (_vertexA + _vertexB);
+        }
+    }
+
+    Triangle::~Triangle() { }
+
+    std::string Triangle::className() const {
+        return "Triangle";
+    }
+
+    Complexity Triangle::complexity() const {
+        return Complexity().comparison(1 + 5).arithmetic(4);
+    }
+
+    scalar Triangle::membership(scalar x) const {
+        if (Op::isNaN(x)) return fl::nan;
+
+        if (Op::isLt(x, _vertexA) or Op::isGt(x, _vertexC))
+            return Term::_height * 0.0;
+
+        if (Op::isEq(x, _vertexB))
+            return Term::_height * 1.0;
+
+        if (Op::isLt(x, _vertexB)) {
+            if (_vertexA == -fl::inf)
+                return Term::_height * 1.0;
+            return Term::_height * (x - _vertexA) / (_vertexB - _vertexA);
+        }
+        if (_vertexC == fl::inf)
+            return Term::_height * 1.0;
+        return Term::_height * (_vertexC - x) / (_vertexC - _vertexB);
+    }
+
+    std::string Triangle::parameters() const {
+        return Op::join(3, " ", _vertexA, _vertexB, _vertexC) +
+                (not Op::isEq(getHeight(), 1.0) ? " " + Op::str(getHeight()) : "");
+    }
+
+    void Triangle::configure(const std::string& parameters) {
+        if (parameters.empty()) return;
+        std::vector<std::string> values = Op::split(parameters, " ");
+        std::size_t required = 3;
+        if (values.size() < required) {
+            std::ostringstream ex;
+            ex << "[configuration error] term <" << className() << ">"
+                    << " requires <" << required << "> parameters";
+            throw Exception(ex.str(), FL_AT);
+        }
+        setVertexA(Op::toScalar(values.at(0)));
+        setVertexB(Op::toScalar(values.at(1)));
+        setVertexC(Op::toScalar(values.at(2)));
+        if (values.size() > required)
+            setHeight(Op::toScalar(values.at(required)));
+    }
+
+    void Triangle::setVertexA(scalar a) {
+        this->_vertexA = a;
+    }
+
+    scalar Triangle::getVertexA() const {
+        return this->_vertexA;
+    }
+
+    void Triangle::setVertexB(scalar b) {
+        this->_vertexB = b;
+    }
+
+    scalar Triangle::getVertexB() const {
+        return this->_vertexB;
+    }
+
+    void Triangle::setVertexC(scalar c) {
+        this->_vertexC = c;
+    }
+
+    scalar Triangle::getVertexC() const {
+        return this->_vertexC;
+    }
+
+    Triangle* Triangle::clone() const {
+        return new Triangle(*this);
+    }
+
+    Term* Triangle::constructor() {
+        return new Triangle;
+    }
+
+
+}