What is the most logical next event?

How to classify triangles
Measure each side of the 3 sides of the triangle using a ruler.
Place the ruler at the end of each line segment of the 3 lines in the triangle and measure to the opposite endpoint of each line.
Make note of the measurement for each of the 3 triangle sides.
Determine how the 3 sides compare in length. Inspect to see if some lines are longer than others in length and if any of the lines are equal in length.