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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Main
  6. {
  7. 	public static void main (String[] args) throws java.lang.Exception
  8. 	{
  9. 		double a, b, alpha, h=0;
  10. 		Scanner sc = new Scanner(System.in);
  11. 		a = sc.nextDouble();
  12. 		b = sc.nextDouble();
  13. 		alpha = sc.nextDouble();
  14. 		h = ((a-b) / 2 ) * Math.tan(alpha);
  15. 		System.out.format("%f", h * ( (a+b) / 2));
  16. 	}
  17. }
Success #stdin #stdout 0.17s 322368KB
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15	10	0.785398
stdout
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31.249989787661146
https://ideone.com/f9dddQ
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
secret

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