A teacher asks her students to design a game board for a class project. The dimensions of the boards created by four students are shown here. Angela length: 20 cm width: 21 cm diagonal: 29 cm Bradley length: 9 in. width: 9 in. diagonal: 9 in. Carlton length: 25 cm width: 30 cm diagonal: 35 cm Della length: 10 in. width: 12 in. diagonal: 15 in. Whose game board could be a rectangle?