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Thursday, May 20, 2021, 8:17 PM, , import java.util.*;, class rect, {, public static void main(), {, Scanner sc=new Scanner(System.in);, int ch,l,b;, System.out.println("1.Area");, System.out.println("2.Perimeter");, System.out.println("3.Diagonal");, System.out.println("Enter choice");, ch=sc.nextInt();, System.out.println("Enter length & breath");, l=sc.nextInt();, b=sc.nextInt();, if(ch==1), System.out.println("Area="+(l*b));, else if(ch==2), System.out.println("Perimeter="+2*(l+b));, else if(ch==3), System.out.println("Diagonal="+Math.sqrt(l*l+b*b));, else, System.out.println("Invalid choice");, }, }, , import java.util.*;, class calculator, {, public static void main(), {, Scanner sc=new Scanner(System.in);, int a,b;, , COMBINED ICSE 246 Page 1