using System;
public class Program
{
public static void Main()
int r=10;
int a=90;
double oabp=(a*3.14*r*r)/360;
double oab=(1*r*r)/2;
double segment=oabp-oab;
double majorsector=((360-a)*3.14*r*r)/360;
Console.WriteLine("oabp is"+oabp);
Console.WriteLine("majorsector is"+majorsector);
}