Algorithms/JavaAlgorithms
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Add surface area of Cone and Hemisphere (#2791)

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Vɪɴᴀʏᴀᴋ Pᴀɴᴅᴇʏ 2021-10-31 17:12:49 +05:30 committed by GitHub
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Maths/Area.java
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@ -31,6 +31,15 @@ public class Area {
/* test cylinder */
assert Double.compare(surfaceAreaCylinder(1,2), 18.84955592153876) == 0;
/* test hemisphere */
assert Double.compare(surfaceAreaHemisphere(5), 235.61944901923448) == 0;
assert Double.compare(surfaceAreaHemisphere(1), 9.42477796076938) == 0;
/* test cone */
assert Double.compare(surfaceAreaCone(6, 8), 301.59289474462014) == 0;
assert Double.compare(surfaceAreaCone(10, 24), 1130.9733552923256) == 0;
}
/**
@ -127,4 +136,25 @@ public class Area {
private static double surfaceAreaCircle(double radius) {
return 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));
}
}