title: Program To Find The Area Of Pentagon
signature: programToFindTheAreaOfPentagon(a) {
test_code: import 'dart:convert';
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  bool validateSolution(double actual, double expected){
      return (actual - expected).abs() < 1e-09;
  }
  
  String driver(a, double expected){
      try
      {
          if (validateSolution(PLACEHOLDER_FN_NAME(a), expected)){
              return "PASSED";
          }
          return "FAILED";
      }catch(exception_object){
          return exception_object.runtimeType.toString();
      }
  }
  
  int main() {
  
      print("TEST-0...${driver(
          2009.019461888707, 
          6944120.6857642615)
      }");
  
      print("TEST-1...${driver(
          -1480.5131394215787, 
          3771147.371815937)
      }");
  
      print("TEST-2...${driver(
          357.7870347569567, 
          220240.9998483103)
      }");
  
      print("TEST-3...${driver(
          -8040.293697508038, 
          111222537.30911414)
      }");
  
      print("TEST-4...${driver(
          3821.882657293133, 
          25130647.008061722)
      }");
  
      print("TEST-5...${driver(
          -6840.635072240347, 
          80508515.3102342)
      }");
  
      print("TEST-6...${driver(
          1623.036598830132, 
          4532163.809416133)
      }");
  
      print("TEST-7...${driver(
          -9714.00706195298, 
          162347573.54592204)
      }");
  
      print("TEST-8...${driver(
          3916.454769669618, 
          26389745.561382204)
      }");
  
      print("TEST-9...${driver(
          -669.068424712943, 
          770176.1075446572)
      }");
  
      return 0;
  }
source_py: def program_to_find_the_area_of_pentagon(a):
      area = (((sqrt((5 * (5 + (2 * sqrt(5))))) * a) * a) / 4)
      return area
source_cpp: float program_to_find_the_area_of_pentagon(float a) {
    float area;
    area = ( sqrt ( 5 * ( 5 + 2 * ( sqrt ( 5 ) ) ) ) * a * a ) / 4;
    return area;
  }