<span>Work out the Mean (the simple average of the numbers)Then for each number: subtract the Mean and square the result.Then work out the mean of those squared differences.<span>Take the square root of that and we are done!</span></span>
Answer: I think Figure D and A are congruent
Step-by-step explanation: Remember: congruent means the same (in geometry) so if im wrong. Then you could figure out for yourself which ones look the same. Good luck
Step-by-step explanation:

8/36
Divide the numerator and the denominator by 4
2/9
That's the simplest form
Have an awesome day! :)