In this article we will show you, How to write C Program to find Area of a Right Angled Triangle with example. Before we step into the program, Let see the definition and formula behind Area of a Right Angled Triangle

## Area of a Right Angled Triangle

If we know the width and height then, we can calculate the area of a right angled triangle using below formula.

Area = (1/2) * width * height

Using Pythagoras formula we can easily find the unknown sides in the right angled triangle.

c² = a² + b²

Perimeter is the distance around the edges. We can calculate perimeter using below formula

Perimeter = a + b+ c

## C Program to find Area of a Right Angled Triangle Example

This C Program allows the user to enter width and height of the Right Angled Triangle. Using those values we will calculate the Area and perimeter of the Right Angled Triangle.

/* C Program to find Area of a Right Angled Triangle Example */ #include<stdio.h> #include<math.h> int main() { float width, height, c, Area, Perimeter; printf("\n Please Enter height and width of the right angled triangle\n"); scanf("%f%f",&width, &height); Area = 0.5 * width * height; c = sqrt((width*width) + (height*height)); Perimeter = width + height + c; printf("\n Area of right angled triangle is: %.2f\n",Area); printf("\n Other side of right angled triangle is: %.2f\n",c); printf("\n Perimeter of right angled triangle is: %.2f\n", Perimeter); return 0; }

**OUTPUT:**

**ANALYSIS**

Following statements will allow the User to enter the Width and Height of a right-angled triangle.

printf("\n Please Enter height and width of the right angled triangle\n"); scanf("%f%f",&width, &height);

Next, we are calculating the area (The value of 1/2 = 0.5). So we used 0.5 * width*height as the formula

Area = 0.5 * width * height

In the next line, We are calculating the other side of a right-angled triangle using the Pythagoras formula C²=a²+b² , Which is similar to C = √a²+b²

c = sqrt((width*width) + (height*height))

Here we used sqrt() function to calculate the square root of the a²+b². sqrt() is the math function, which is used to calculate the square root.

In the next line, We are calculating the perimeter using the formula

Perimeter = width + height + c

Following printf statements will help us to print the Perimeter, Other side and Area of a right angled Triangle

printf("\n Area of right angled triangle is: %.2f\n",Area); printf("\n Other side of right angled triangle is: %.2f\n",c); printf("\n Perimeter of right angled triangle is: %.2f\n", Perimeter);

**NOTE:** Please be careful while placing the open and close brackets, it may change the entire calculation if you place it wrong

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