Min works in the kitchen of a catering company. Today her job is to, cut whole pita bread into small triangles. Min uses a cutting machine, so every pita triangle comes out the same. The figure shows an example ( an isosceles triangle with a base of 4 cm, height of 5.7 cm, and side lengths of 6 cm). Min has been told to cut 3 pita triangles for every guest. There will be 250 guests. If the pita bread she uses comes in squares with 20 -centimeter sides and she doesn't waste any bread, how many squares of whole pita bread will Min have to cut up ?