changes

Author: syadk23

src/main/java/com/thealgorithms/audiofilters/EMAFilter.java

@@ -46,3 +46,21 @@ public double[] apply(double[] audioSignal) {
         return emaSignal;
     }
 }
+/**
+* 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;
+    }