Area of a triangle Program Plan: Define the main function. Get the values of “a”, “b”, and “c” from the user. Calculate perimeter of the triangle and store it in a variable “s”. Calculate area of a triangle and store it in a variable “area”. Print the value of “area”.

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Chapter 3, Problem 9PE

Program Plan Intro

Area of a triangle

Program Plan:

Define the main function.

Get the values of “a”, “b”, and “c” from the user.

Calculate perimeter of the triangle and store it in a variable “s”.

Calculate area of a triangle and store it in a variable “area”.

Print the value of “area”.

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Using Heron's formula, you can calculate the area of a triangle if you know the lengths of all three sides. Given the length of each side of a triangle as input, calculate the area of the triangle using Heron's formula as follows: s = half of the triangle's perimeter area = the square root of s(s-a)(s-b)(s-c), where a, b, and c are each sides of the triangle. Use the Math.sqrt() method for calculating the square root. Output the floating-point value of the area with three digits after the decimal point, which can be achieved as follows:System.out.printf("The area of the triangle is %.3f\n", yourValue);

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