You have a piece of paper, 10cm by 10cm. Area = 100cm^2. For some reason, you need a square piece of paper with an area of 50cm^2. Using the paper you have, what's an easy way of getting the new square?
By marking the middle of each side and draw four straight lines.
the new straight lines are valued sqroot (5^2 +5^2) or sqroot (50)
therefore the by cutting across the lines , we get a square of 50 cm^2
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