sem 13

1 files changed, 24 insertions, 0 deletions

diff --git a/Sem. 13/Figures/Triangle.cpp b/Sem. 13/Figures/Triangle.cpp
new file mode 100644
index 0000000..7de831c
--- /dev/null
+++ b/Sem. 13/Figures/Triangle.cpp
@@ -0,0 +1,24 @@
+#include "Triangle.h"
+
+Triangle::Triangle(int x1, int y1, int x2, int y2, int x3, int y3) : Shape(3)
+{
+	setPoint(0, x1, y1);
+	setPoint(1, x2, y2);
+	setPoint(2, x3, y3);
+}
+double Triangle::getArea() const
+{
+	Shape::point p1 = getPointAtIndex(0);
+	Shape::point p2 = getPointAtIndex(1);
+	Shape::point p3 = getPointAtIndex(2);
+
+	return abs(p1.x*p2.y + p2.x*p3.y + p3.x*p1.y - p1.y * p2.x - p2.y*p3.x - p3.y*p1.x) / 2.00;
+}
+double Triangle::getPer() const
+{
+	Shape::point p1 = getPointAtIndex(0);
+	Shape::point p2 = getPointAtIndex(1);
+	Shape::point p3 = getPointAtIndex(2);
+
+	return p1.getDist(p2) + p2.getDist(p3) + p3.getDist(p1);
+}
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