Notes

#include <stdio.h>
#include <math.h>

int main() {
// Part A: Circle
double R, circle_area, circle_circumference;

// Input the radius (R) of the circle
printf("Enter the radius (R) of the circle: ");
scanf("%lf", &R);

// Calculate the area and circumference of the circle
circle_area = M_PI * R * R;
circle_circumference = 2 * M_PI * R;

// Output the results for the circle
printf("Surface area of the circle: %.2lfn", circle_area);
printf("Circumference of the circle: %.2lfn", circle_circumference);

// Part B: Euclidean Distance
double x1, y1, x2, y2, distance;

// Input the coordinates (x1, y1) and (x2, y2)
printf("Enter the x and y coordinates of the first point (x1 y1): ");
scanf("%lf %lf", &x1, &y1);
printf("Enter the x and y coordinates of the second point (x2 y2): ");
scanf("%lf %lf", &x2, &y2);

// Calculate the Euclidean distance between the two points
distance = sqrt(pow(x2 - x1, 2) + pow(y2 - y1, 2));

// Output the distance between the two points
printf("Euclidean Distance between the two points: %.2lfn", distance);

return 0;
}