text: need help. you better be good at math. be a doll and help me, would you? there are nine points on a plane. no three points are in a straight line. how many different triangles can be formed using the 9 points? all the points are in a nonagon form, if you create lines. please answer asap. love ya. :) if no 3 points are in a line then any 3 gotten points makes a different triangle. the number of combinations in which you can get these 3 points is c_9^3 = 9*8*7/3! = 84. so, the answer is: 84 triangles.