Question

In a right triangle, the square of the length of one side is equal to the sum of the squares of the lengths of the other two sides. Write a program that prompts the user to enter the lengths of three sides of a triangle and then outputs a message indicating whether the triangle is a right triangle. If the triangle is a right triangle, output It is a right angled triangle If the triangle is not a right triangle, output It is not a right angled triangle.

Answer 1

Answer:

// here is program in C.

// include header

#include <stdio.h>

#include<math.h>

//main function

int main()

{

 // variables

 int x,y,z;

 int flag=0;

 // ask to enter the sides of triangle

 printf("enter the length of all sides of triangle:");

 // read the sides

 scanf("%d %d %d",&x,&y,&z);

 // check if square of any side is equal

 //to sum of square of other two sides

 if((x*x)==(y*y)+(z*z)||(y*y)==(x*x)+(z*z)||(z*z)==(y*y)+(x*x))

 flag=1;

 // if right angled triangle

 if(flag==1)

     printf("right angled triangle.\n");

// if not right angled triangle

 else

     printf(" not  a right angled triangle.\n");

   return 0;

}

Explanation:

Read the sides of the triangle and assign them to x,y,z respectively.Then check ((x*x)==(y*y)+(z*z)||(y*y)==(x*x)+(z*z)||(z*z)==(y*y)+(x*x)).If it true then set flag=1.After this if flag==1 then print triangle is right angled else not right angled.

Output:

enter the length of all sides of triangle:3 4 5

right angled triangle.