Description: MyPoint first create a class, and then define the Triangle class. In the Triangle class defines three MyPoint instance to represent the three points of a triangle, and then define a method setTri initialize these three points, then define the perimeter of the triangle two methods, area. In main (), create an object, find the three points of the triangle given perimeter, area.
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三角形
......\build
......\.....\classes
......\.....\.......\mypoint
......\.....\.......\三角形
......\.....\.......\......\Point.class
......\.....\.......\......\Triangle.class
......\.....\.......\......\三角形.class
......\build.xml
......\manifest.mf
......\nbproject
......\.........\build-impl.xml
......\.........\genfiles.properties
......\.........\private
......\.........\.......\private.properties
......\.........\.......\private.xml
......\.........\project.properties
......\.........\project.xml
......\src
......\...\三角形
......\...\......\Point.java
......\...\......\Triangle.java
......\...\......\三角形.java
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