2. choose the size of the paper to use. *i recommend the standard 8.5in by 11in paper* then fold it diagonally and cut it to make a square. *once you cut off the bottom portion of the rectangular, the sides of the square will be 8.5in. 3. cut the square in half along the diagonal to form two paper triangles. these will be your pennant flags. 4. measure the diagonal of the triangle: use the pythagorean theorem* (a^2+b^2=c^2)to determine the length of the diagonal (hypotenuse): *your actual measurement and your pythagorean theorem answer should be the same or similar. 5.divide the length of the room (measurement from step1), by the length of the hypotenuse: *that is how many triangles you will need to create your string of pennant flags\.\* how many flags will you need to cover the entire length of the *the diagonal of the triangle is called the hypotenuse. plug the measurements of the two walls for a and b\.\*