Use the image to answer the question.
A rectangle is divided into 12 equal parts as four rows and three columns. The first part in each of the four rows are shaded. The one shaded part of the first row is further shaded using diagonal lines.
Interpret the model to determine the fraction used to divide 1/3.
Based on the image, we can see that the rectangle is divided into 12 equal parts. The first part in each row is shaded, which means that there are a total of 4 shaded parts. Additionally, the one shaded part in the first row is further shaded using diagonal lines.
To determine the fraction used to divide 1/3, we need to determine how many parts out of the 12 parts represent 1/3. Since each row represents 1/3 of the whole rectangle, the 4 shaded parts represent the full 1/3.
Therefore, the fraction used to divide 1/3 is 4/12.