1 files changed, 30 insertions, 0 deletions
diff --git a/sem5/oop/m4/shapes/src/MyTriangle.java b/sem5/oop/m4/shapes/src/MyTriangle.java
new file mode 100644
index 0000000..bf9f21f
--- /dev/null
+++ b/sem5/oop/m4/shapes/src/MyTriangle.java
@@ -0,0 +1,30 @@
+
+public class MyTriangle implements Shape2d {
+	private MyPoint a, b, c;
+	
+	/**
+	 * Creates a new triangle with the 3 corners a, b, c
+	 */
+	public MyTriangle(MyPoint a, MyPoint b, MyPoint c) {
+		this.a = a;
+		this.b = b;
+		this.c = c;
+	}
+	
+	// https://www.mathopenref.com/coordtrianglearea.html
+	public double area() {
+		return Math.abs((
+				this.a.getX() * (this.b.getY() - this.c.getY()) +
+				this.b.getX() * (this.c.getY() - this.a.getY()) +
+				this.c.getX() * (this.a.getY() - this.b.getY())) / 2);
+	}
+	
+	public double perimeter() {
+		// Calculate the length of the 3 lines between points
+		double ab = b.sub(a).modulo();
+		double bc = c.sub(b).modulo();
+		double ca = a.sub(c).modulo();
+		
+		return ab + bc + ca;
+	}
+}