Answer:
if (isIsosceles){
isoCount +=1;
triangleCount +=1;
polygonCount+=1;
}
Explanation:
Using Java programming language, we have shown the full implementation.
The three variables (isoCount, triangleCount, and polygonCount) were declared and initialized to 1,2,3 respectively
After the if condition, the new values for these variables are printed to the screen and they become 2,3,4 respectively. complete code is given below
public class num3 {
public static void main(String[] args) {
boolean isIsosceles = true;
int isoCount = 1;
int triangleCount=2;
int polygonCount=3;
if (isIsosceles){
isoCount +=1;
triangleCount +=1;
polygonCount+=1;
}
System.out.println(isoCount);
System.out.println(triangleCount);
System.out.println(polygonCount);
}
}