Added surface area of cone and hemisphere

shitkoder · web-flow · commit 43da050a81a6 · 2021-10-31T16:15:41.000+05:30
diff --git a/Maths/Area.java b/Maths/Area.java
@@ -10,6 +10,14 @@ public static void main(String[] args) {
     /* test sphere */
     assert Double.compare(surfaceAreaSphere(5), 314.1592653589793) == 0;
     assert Double.compare(surfaceAreaSphere(1), 12.566370614359172) == 0;
+ 
+    /* test hemisphere */
+    assert Double.compare(surfaceAreaHemiphere(5), 235.61944901923448) == 0;
+    assert Double.compare(surfaceAreaHemiphere(1), 9.42477796076938) == 0;
+
+    /* test cone */
+    assert Double.compare(surfaceAreaCone(6, 8), 301.59289474462014) == 0;
+    assert Double.compare(surfaceAreaCone(10, 24), 1130.9733552923256) == 0;
 
     /* test rectangle */
     assert Double.compare(surfaceAreaRectangle(10, 20), 200.0) == 0;
@@ -53,6 +61,27 @@ private static double surfaceAreaSphere(double radius) {
     return 4 * Math.PI * radius * radius;
   }
 
+  /**
+   * Calculate the surface area of a hemisphere.
+   *
+   * @param radius radius of hemisphere
+   * @return surface area of given hemisphere
+   */
+  private static double surfaceAreaHemisphere(double radius) {
+    return 3 * Math.PI * radius * radius;
+  }
+
+  /**
+   * Calculate the surface area of a cone.
+   *
+   * @param radius radius of cone.
+   * @param height of cone.
+   * @return surface area of given cone.
+   */
+  private static double surfaceAreaCone(double radius, double height) {
+    return Math.PI * radius * (radius + Math.pow((height * height + radius * radius), 0.5));
+  }
+
   /**
    * Calculate the area of a rectangle
    *
