Update Area.java

Author: Bmasoudd

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

@@ -6,6 +6,24 @@
 public final class Area {
     private Area() {
     }
+/**
+ * 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;
+}
 
     /**
      * String of IllegalArgumentException for radius