Example 44: Area of a Triangle

Problem

Write a function to compute the distance between two points, and use it to develop another function that will compute the area of the triangle whose vertices are A (x1, y1), B (x2, y2), and C (x3, y3), and ascertain if the triangle is valid.

Example

Input (Point 1, Point 2, Point 3)	Output
0 0 6 0 0 8	Length of first side = 6.000000 Length of second side = 10.000000 Length of third side = 8.000000 Area: 24.000000
0 4 0 8 0 15	Length of first side = 4.000000 Length of second side = 7.000000 Length of third side = 11.000000 Not a triangle

Try it yourself

Try to solve this question on your own in the code widget below. If you get stuck, you can always refer to the solution provided.

❗Note: To run your solution or our given solution, follow the following steps:

• Click on the run button.
• Wait for the 4 steps to complete, and then switch to the terminal tab.
• In the terminal tab, write the following command:
  gcc main.c -o main -lm
  Then, write this command:
  ./main

❗Note: The C language requires -lm flag while executing a program that uses the math library.