C program To Find Area of Right Angled Triangle

Lets write a C program to calculate area of a right angled Triangle, by asking the user to enter its width and height.

Related Read:
Find Area of a Triangle Using Its Sides: C Program
Find Area of a Triangle Using Its Base and Height: C Program

Formula To Find Area of Right Angled Triangle

Area = (width * Height) / 2.0;

OR

Area = (width * Height * 0.5);

Note: If we divide an expression or number by 2, it’ll return only the integer part and the decimal part will be discarded. So we are dividing the expression by 2.0 (which is of type double).

C program To Find Area of Right Angled Triangle

Source Code: C program To Find Area of Right Angled Triangle

#include < stdio.h >

int main()
{
    float h, w, area;

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

    area = (h * w) / 2.0;

    printf("Area of a Right Angled Triangle is %f\n", area);

    return 0;
}

Output:
Enter height and width of a right angled triangle
10
5
Area of a Right Angled Triangle is 25.000000

Validate the Input and Find Area of Triangle: C Program

#include < stdio.h >

int main()
{
    float h, w, area;

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

    if(w == 0 || h == 0)
    {
        printf("Invalid Input\n");
    }
    else
    {
        area = (h * w) / 2.0;
        printf("Area of a Right Angled Triangle is %f\n", area);
    }

    return 0;
}

Output 1:
Enter height and width of a right angled triangle
10
5
Area of a Right Angled Triangle is 25.000000

Output 2:
Enter height and width of a right angled triangle
0
5
Invalid Input

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