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Added surface area calculation for pyramid #7703

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Added surface area calculation for pyramid #7703

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41 changes: 21 additions & 20 deletions src/main/java/com/thealgorithms/maths/Area.java
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@

package com.thealgorithms.maths;

/**
Expand Down Expand Up @@ -69,30 +70,11 @@ public static double surfaceAreaSphere(final double radius) {
return 4 * Math.PI * radius * radius;
}

/**
* 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("");
}
if (slantHeight <= 0) {
throw new IllegalArgumentException("slant height must be greater than 0");
}
double baseArea = sideLength * sideLength;
double lateralSurfaceArea = 2 * sideLength * slantHeight;
return baseArea + lateralSurfaceArea;
}

/**
* Calculate the area of a rectangle.
*
* @param length length of a rectangle
* @param width width of a rectangle
* @param width width of a rectangle
* @return area of given rectangle
*/
public static double surfaceAreaRectangle(final double length, final double width) {
Expand Down Expand Up @@ -232,4 +214,23 @@ public static double surfaceAreaCone(final double radius, final double height) {
}
return Math.PI * radius * (radius + Math.pow(height * height + radius * radius, 0.5));
}

/**
* 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;
}
}
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