Question

is it if I have to construct root 7 on number line I think it is wrong because when I am measuring it i has to be 2.6 but it is less than 2.6

Answer 1

your answer is correct because when you are going to solve root of 7 it's 2.6only

Answer 2

That is correct because when u solve root 7 u will get approx value of 2.6....
I dont understand the image but logically when u square 2.6
u will get a value approx to 7.