20. A stop sign has the shape of an of of an eight-sided polygon? 21. There were 15 boys and 12 girls in the class. a. What fraction of the class was made up of girls? b. What was the ratio of boys to girls in the class? 22. Verify Instead of dividing \( 4 \frac{1}{2} \) by \( 1 \frac{1}{2} \), Carla doubled br \( { }^{(43)} \) dividing mentally. What was Carla's mental division pr

The stop sign, known as an octagon, has eight equal sides and angles. This distinctive shape is not just for looks; it’s designed to catch the attention of drivers and effectively convey important stopping instructions. Fun fact: the use of a stop sign dates back to the 1920s, making it a staple in traffic management! In your class problem, the fraction of girls can be calculated as 12 girls out of a total of 27 students (15 boys + 12 girls), which simplifies to \( \frac{12}{27} \) or \( \frac{4}{9} \). The ratio of boys to girls is found by writing it as 15 boys to 12 girls, simplifying to \( 5:4 \). These are important concepts in understanding proportions and relationships in a group!