Ateacher asks her students to design a game board for a class project. the dimensions of the boards created by four students are shown below. 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?

Angela's board is a rectangle.

Step-by-step explanation:

As we know rectangle follow two properties.

1). All angles of a rectangle are right angle.

2). Opposite sides of a rectangle are equal in measure.

Since all angles of a rectangle are 90°. Therefore, right angle triangle formed by length, width and diagonal will follow Pythagoras theorem.

For Angela

20² + 21² = 841 = 29²

Therefore Angela's board is a rectangle.

For Bradley

9² + 9² = 162 ≈ 9²

So Bradley's board is not a rectangle.

For Carlton

25² + 30² = 1525 ≠ 35²

Carlton's board is not a rectangle.

For Della

10² + 12² = 244 ≠ 15²

Della's board is not a rectangle.

Therefore, Angela's board is a rectangle.

answer: about 22.67

step-by-step explanation: