I believe it may be C. Because, the color changing has nothing to do with the reaction you get.
Answer:
The most basic fact about triangles is that all the angles add up to a total of 180 degrees. The angle between the sides can be anything from greater than 0 to less than 180 degrees. The angles can't be 0 or 180 degrees, because the triangles would become straight lines.
Step-by-step explanation:
basic only
Asking the Math Gods...
A=W*L
9*3=27in^2
9*5=45in^2