Calculating the Perimeter of a Shape

Calculating the Perimeter of a Shape

TOTAL POINTS 7

1.Question 1

What is the perimeter of the shape made from the file datatest4.txt whose contents are shown below (just give to two decimal places)?

-3, 9

-8, 7

-12, 4

-6, -2

-4, -6

2, -8

6, -5

10, -3

8, 5

4, 8

1 point

2.Question 2

What is the average length of a side in the shape made from the file datatest4.txt whose contents are shown below (just give to two decimal places)?

-3, 9

-8, 7

-12, 4

-6, -2

-4, -6

2, -8

6, -5

10, -3

8, 5

4, 8

1 point

3.Question 3

What is the longest side in the shape made from the file datatest4.txt whose contents are shown below (just give to two decimal places)?

-3, 9

-8, 7

-12, 4

-6, -2

-4, -6

2, -8

6, -5

10, -3

8, 5

4, 8

1 point

4.Question 4

What is the largest perimeter of a shape made from the shapes in files dataset1.txt, dataset2.txt, dataset3.txt, dataset4.txt, dataset5.txt, and dataset6.txt (just give to two decimal places)?

1 point

5.Question 5

What is the name of the file that has the shape with the largest perimeter from the four files example1.txt, example2.txt, example3.txt and example4.txt?

example1.txt

example2.txt

example3.txt

example4.txt

1 point

6.Question 6

The method getNumPoints returns the number of points in a Shape s.

Which one of the following is NOT a correct implementation of getNumPoints?

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public int getNumPoints (Shape s) {



  int count = 0;



  for (Point p : s.getPoints()) {



    int newPoint = 1;



    count = count + newPoint;



  }



  return count;



}

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public int getNumPoints (Shape s) {



  int count = 0;



  int newPoint = 1;



  for (Point p : s.getPoints()) {



    count = count + newPoint;



  }



  return count;



}

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public int getNumPoints (Shape s) {



  int count = 0;



  for (Point p : s.getPoints()) {



    count = count + count;



  }



  return count;



}

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public int getNumPoints (Shape s) {



  int count = 0;



  for (Point p : s.getPoints()) {



    count = count + 1;



  }



  return count;



}

1 point

7.Question 7

Consider the following code for the function mysteryShape that has one parameter a Shape s and calls the function getNumPoints from the assignment.

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public double mysteryShape (Shape s) {



  double tmp = 0;



  for (Point p : s.getPoints()) {



    



    if (p.getX() > 0) {



      



      if (p.getY() < 0) {



        tmp = tmp + 1;



      }



    }



  }



  return tmp / getNumPoints(s);    



}

Which one of the following best describes the purpose of this function?

The function computes the percentage of those points from the Shape s that have a positive X or a negative Y.

The function computes the sum of those points from the Shape s that have a positive X and a negative Y.

The function computes the percentage of those points from the Shape s that have a positive X and a negative Y.

The function computes the sum of those points from the Shape s that have a positive X or a negative Y.

1 point

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