Show how root 5 can be represented on the number line?

Dear Student,

Please find below the solution to the asked query:

We know that,

And, 

Mark a point ‘A’ representing 2 on number line. Now, construct AB of unit length perpendicular to OA. Then, taking O as centre and OB as radius, draw

an arc intersecting number line at C. and at point C we represent $\sqrt{5}$

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