Question 200409
find the length between each of the three sets of two points
*[invoke hummingbird_distance_2D_geo -2, -2, 2, 4]
*[invoke hummingbird_distance_2D_geo -2, -2, 8, 0]
*[invoke hummingbird_distance_2D_geo 8, 0, 2, 4]

Now use Pathogrean theorem. If {{{c^2 = a^2 + b^2}}} then it is a right triangle
If two side are the same length, then it is isocelese