Answer:
2
Step-by-step explanation:
Using the rule of radicals
×
⇔ 
Simplifying the radicals

= 
=
×
= 4

= 
=
×
= 2
Thus
+ 2
- 2
= 4
+ 2
- 4
← collect like terms
= 2
For this case, we have by definition, that an irrational number is a number that can not be expressed as a fraction
, where a and b are integers and b is nonzero.
Some examples are:

So, that the answer is 
Answer:
Option C
Answer:
Thanks for the points
Step-by-step explanation:
Answer:
R= diameter ÷ 2
Step-by-step explanation:
the radius is half the diameter.