Shilo is trying to compute the value of 27 + 55 + 13. she adds 27 + 13 to get 40, and then adds on 55. which of the following properties is shilo using? commutative distributive associative identity

Shown here are the three essential steps in a proof of the pythagorean theorem. comparing the 1st and 3rd steps how are the colored regions related as to the areas? a. yellow+blue=orange b. orange=yellow=green c.yellow+blue=green=orange d.yellow+green=orange+blue