All right everyone, so here it says in this example question, determine the number of significant figures involved in measuring the length of the square. So in measuring the length of the square we have this measurement. We see that this here is the 3.0cm hash mark and this is 3.1 and this is 3.2.
So we see 3.2cm. Remember, with the right number significant figures, we have to add an additional decimal place. That would mean that the best answer would be 3.20cm, making options C our best choice.