Draw a line and divide that line into eight. And between 0-1, 1-2 etc make five division on both the sides of the line. Just counts the lines from the line just drawn after 0 till in the lines u get 8/5 . And mark it.
Mark a point on 4 units on right side of number line. ... Draw a segment of 2 units from point A perpendicular to number line with the help of protractor. ... Join points O and B. Now the length of OB is square root(20) by Pythagoras' theorom.
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Answer:
Draw a line and divide that line into eight. And between 0-1, 1-2 etc make five division on both the sides of the line. Just counts the lines from the line just drawn after 0 till in the lines u get 8/5 . And mark it.
Mark a point on 4 units on right side of number line. ... Draw a segment of 2 units from point A perpendicular to number line with the help of protractor. ... Join points O and B. Now the length of OB is square root(20) by Pythagoras' theorom.
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