Number 8 would be B. Number 9 would be A. Hope this helps! Mark brainliest? :))
Answer:B
Step-by-step explanation:
In order to rationalize the denominator of each expression, we need to multiply the expression by the same radical in the denominator, this way we can remove the radical from the denominator.
9)

10)

11)

12)
Answer:
A: Rectangle
Step-by-step explanation:
Hopefully this helps
Number 3 is 11 degrees
Number four is 51 degrees.
Number 5 is 21 degrees
Number 7 is altitude