Answers A. and B. Are correct
If this is multiple choice im gonna say C
Answer: Sphere
Step-by-step explanation:
Answer:
11.25
Step-by-step explanation:
We know in these kind of triangles that have a 90 degrees angle, we can do:

so the first question:

and then:

so , when you want to rationalize , usually you must multiply the irrational factor as 1:

so , now multiply:

in the next question,we know negative numbers in radical don't have any solution so 2 is correct,