Question

how to represent root 7.28 on the number line ?

Answer 1

I hope this answer will help you. You can use the same procedure to represent root 3.8 and root x and root6.8 etc...

Answer 2

firstly draw a line AB of 7.28cm and then increase 1 unit more from point B to C and then taking C as a centre draw a semi-circle from A to C and then at point B draw a perpendicular from point F and this perpendicular line is equal to √7.28 and cut an arc from point B on the number line.