show how root 4 can be represented on the number line
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Draw a no. line and take B at 0 and C at 1 i.e. take BC = 1 units with B at 0.
Draw AC perpendicular to BC with length 1 units .
Join AB and use Pythagoras theorem to find the length of AB which will be ✓2.
Keep pointer of compass at B and taking radius as BA draw an arc cutting the number line in point D. AB = BD =✓2.
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