How do you write a program to find the area of a triangle?

Answer 1

The area of a triangle is one half base times height, so you would write a program to input the base and height, giving the option to stop, calculating and printing the area, and then looping to repeat as desired.

Answer 2

To find the area of a triangle you first need to know the base and height:

double area_of_triangle (double base, double height) {

return base * height / 2;

}

If we don't know the height, then we need to know the length of any two sides and the included angle. Using standard notation where the sides are labelled a, b and c and their opposing angles as A, B and C, given sides a, b and angle C where a is the base, the height is calculated as b * sin (C):

#include<math.h> // sin() function

double area_of_triangle2 (double a, double b, double C) {

return a * b * sin (C) / 2;

}