Show how can be represented on the number line.
Mark a point ‘A’ representing 2 on the number line. Now, construct AB of unit length which is perpendicular to OA.
So, we have OA = 2 and AB = 1
Using Pythagoras theorem, we can say that
Taking O as centre and OB as radius, draw an arc intersecting number line at C.
Point C represents on the number line.