For this case, the first thing we must observe is that the base of the prism is a triangle.
The area of the triangle is given by:

Where,
b: base of the triangle
h: height of the triangle
Substituting values we have:
Answer:
The area of the base of the triangular prism could be:
X7,y2 i don’t know what else to thing
Answer:
Yes
Step-by-step explanation:
There hasn't been a chemical change, rather, just a physical change. All that had happened was a liquid turning into a solid, which doesn't require a change in elements of the liquid itself.