CCGPS CA 6.1.2 Example 4

A right triangle is defined as a triangle with 2 sides that are perpendicular. Triangle ABC has vertices A (–4, 8), B (–1, 2), and C (7, 6). Determine if this triangle is a right triangle. When disproving a figure, you only need to show one condition is not met.
  1. Plot the triangle on a coordinate plane.
  2. Calculate the slope of each side using the general slope formula.
  3. Observe the slopes of each side.
  4. Make connections.