Answer:
public class ANot {
public static void main(String[] args) {
int numberOfSides = 20;
boolean isQuadrilateral;
if(numberOfSides==4){
isQuadrilateral = true;
System.out.println("The triangle is quadrilateral");
}
else{
isQuadrilateral=false;
System.out.println("The triangle is not quadrilateral");
}
}
}
Explanation: