There should be a section about it on your homework. If you can't find any information try looking it up. Also, right triangles are 90 degrees, I hope this helps!
Answer:
In artic areas, the annula temperatures is often below Freezing point
I know one is Pumice not sure about the other one.
The Nile river! :) Hope it helps
Answer:
I have no clue
Explanation:
I don't know why but yeah because of the layers it got it may be the reason but I don't know these
