Chapter 4, Problem 10PE

Program Plan Intro

Program to draw a triangle

Program plan:

• Import the required graphics package.
• Define the main method.
  • Using the object GraphWin(), to display the graphics window.
  • Using the method setCoords(), set the size of the graphics window.
  • Prompt the user for 3 mouse clicks.
  • Store coordinates in variables x1, x2, x3, y1, y2, and y3.
  • Using the method polygon(), draw a triangle in the graphics window.
  • Calculate the area and perimeter of the triangle using the given formula.
  • Print the area and perimeter of the rectangle.
• Call the function “main()”.