Six points A,B,C,D,E, and F are placed on a square grid, as shown. How many triangles that are not right-angled can be drawn by using 3 of these 6 points as vertices?
Answer Choices
A. 2
B. 1
C. 6
D. 0
E. 4
Six points A,B,C,D,E, and F are placed on a square grid, as shown. How many triangles that are not right-angled can be drawn by using 3 of these 6 points as vertices?
Answer Choices
A. 2
B. 1
C. 6
D. 0
E. 4