const circumference = 2 * Math.PI * radius;C = Pi * r * 2 (r stands for radius) Or you could do this: C = Pi * d (d stands for diameter)C = 2*pi*R#include <stdio.h> #define PI 3.142 int main(){ float r, C, A; printf("What is the radius: \n"); scanf("%f", &r); C = 2 * PI * r; A = PI * r * r; printf("\nCincumference is and %f Area is %f\n", C, A); }from math import pi Circumference = pi * diameter Circumference = pi * 2 * radiusCLS INPUT “Radius of circle”; r Area=3.14*r*r PRINT “Area of a circle is”; Area ENDimport math def calculate_circumference(radius): return 2 * math.pi * radius # Example usage: radius = 5 circumference = calculate_circumference(radius) print(f"The circumference of a circle with radius {radius} is {circumference:.2f}")#include <stdio.h> #include <math.h> void main(){ int radius; float perimeter; radius = 6; perimeter = 2*M_PI*radius; printf("Perimeter of the Circle = %f \n",perimeter); }