This can not be done. Every non-negative number on the number line is the square root of its square. You would have to mark every number from zero on.
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To represent the square root of 11.5 on a number line, we first need to approximate the value. The square root of 11.5 is approximately 3.39. On the number line, locate the whole number 3 and then estimate the position of 3.39 between 3 and 4. Mark this point on the number line to represent the square root of 11.5.
Look at the labels.
Mark off your number line in tenths. That's 2.2 and 3.1
A mark on the number one unit to the left of the zero point.
Using Pythagoras Theorem: 5=22+12 Taking positive square root we get 1. Mark a point 'A' representing 2 units on number line. 2. Now construct AB of unit length perpendicular to OA. Join OB 3. Now taking O as centre and OB as radius draw an arc, intersecting number line at point C. 4. Point C represents on number line