finding angle of triangle with two sides and area code example

Example: area of a right angle triangle

#include <stdio.h>
int main(){
    float h, b, A;
    printf("What is the Height and base of the triangle: \n");
    scanf("%f %f", &h, &b);
    A = 0.5 * b *h;
    printf("Area is %f\n", A);
}