(The MyTriangle class) Create a class named MyTriangle that contains the following two met...
(The MyTriangle class) Create a class named MyTriangle that contains the following two methods:
Write a test program that reads three sides for a triangle and computes the area if the input is valid. Otherwise, it displays that the input is invalid. The formula for computing the area of a triangle is given in Programming Exercise 2.15.
Ref:
(Geometry: area of a triangle) Write a program that prompts the user to enter three points (x1, y1), (x2, y2), (x3, y3) of a triangle and displays its area. The formula for computing the area of a triangle is
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