@@ -31,6 +31,15 @@ public static void main(String[] args) {
3131
3232/* test cylinder */
3333assert Double .compare (surfaceAreaCylinder (1 ,2 ),18.84955592153876 ) ==0 ;
34+
35+ /* test hemisphere */
36+ assert Double .compare (surfaceAreaHemisphere (5 ),235.61944901923448 ) ==0 ;
37+ assert Double .compare (surfaceAreaHemisphere (1 ),9.42477796076938 ) ==0 ;
38+
39+ /* test cone */
40+ assert Double .compare (surfaceAreaCone (6 ,8 ),301.59289474462014 ) ==0 ;
41+ assert Double .compare (surfaceAreaCone (10 ,24 ),1130.9733552923256 ) ==0 ;
42+
3443 }
3544
3645/**
@@ -127,4 +136,25 @@ private static double surfaceAreaTrapezium(double base1, double base2, double he
127136private static double surfaceAreaCircle (double radius ) {
128137return Math .PI *radius *radius ;
129138 }
139+
140+ /**
141+ * Calculate the surface area of a hemisphere.
142+ *
143+ * @param radius radius of hemisphere
144+ * @return surface area of given hemisphere
145+ */
146+ private static double surfaceAreaHemisphere (double radius ) {
147+ return 3 *Math .PI *radius *radius ;
148+ }
149+
150+ /**
151+ * Calculate the surface area of a cone.
152+ *
153+ * @param radius radius of cone.
154+ * @param height of cone.
155+ * @return surface area of given cone.
156+ */
157+ private static double surfaceAreaCone (double radius ,double height ) {
158+ return Math .PI *radius * (radius +Math .pow ((height *height +radius *radius ),0.5 ));
159+ }
130160}