Added surface area calculation for pyramid

Author: Abdi-Ahmed-Bare

src/main/java/com/thealgorithms/maths/Area.java

@@ -35,6 +35,32 @@ public static double surfaceAreaCube(final double sideLength) {
         return 6 * sideLength * sideLength;
     }
 
+
+/**
+ * Calculate the surface area of a pyramid with a square base.
+ *
+ * @param sideLength side length of the square base
+ * @param slantHeight slant height of the pyramid
+ * @return surface area of the given pyramid
+ */
+public static double surfaceAreaPyramid(final double sideLength, final double slantHeight) {
+    if (sideLength <= 0) {
+        throw new IllegalArgumentException("Must be a positive sideLength");
+    }
+    if (slantHeight <= 0) {
+        throw new IllegalArgumentException("Must be a positive slantHeight");
+    }
+    double baseArea = sideLength * sideLength;
+    double lateralSurfaceArea = 2 * sideLength * slantHeight;
+    return baseArea + lateralSurfaceArea;
+}
+
+
+
+
+
+
+
     /**
      * Calculate the surface area of a sphere.
      *
@@ -192,4 +218,8 @@ public static double surfaceAreaCone(final double radius, final double height) {
         }
         return Math.PI * radius * (radius + Math.pow(height * height + radius * radius, 0.5));
     }
+
+
+
+
 }