http://www.ck12.org Chapter 4. Triangles and Congruence
On thex−yplane, plot the coordinates and determine if the given three points make a scalene or isosceles triangle.
- (-2, 1), (1, -2), (-5, -2)
- (-2, 5), (2, 4), (0, -1)
- (6, 9), (12, 3), (3, -6)
- (-10, -5), (-8, 5), (2, 3)
- (-1, 2), (7, 2), (3, 9)