Answered: Assume a class Triangle has been…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Assume a class Triangle has been defined. It has three instance data, Point p1, p2, p3. The class also has a constructor that receives the 3 Points and initializes p1, p2, and p3, a toString method that outputs the 3 Points, and a computeSurfaceArea method that calculates the surface area of the Tetrahedron (as an it value). We want to extend this class to represent a 3-dimensional Tetrahedron (the Pyramid with triangle base), which consists of 4 Points. Since the Tetrahedron will consist of in essence, 4 triangles, computesurfaceArea for the Tetrahedron will compute 4 * the surface area of the Trian; made up of 3 of those 4 Points. Write the Tetrahedron class to handle the difference(s) between a Tetrahedron and the previously defined Triangle. Assume the instance data of Triangle are protected and all methods are public. Also assume that the class Point has a toString method. Write in Java only provide the stated classes, do not provide the entire code

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