what do the following numbers have in common? 36, 25, 49, 9, 4, 16, 64, 81
TRANSCRIPT
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What do the following numbers have in common?
•36, 25, 49, 9, 4, 16, 64, 81
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These are all numbers you get as a result of squaring another number (multiplying it by itself). They are
called perfect squares.
• What numbers can be multiplied by themselves to get the following numbers?
• 1) __ x __ = 49
• 2) __ x __ = 36
• *This number that you multiplied by itself to produce a product (answer to a multiplication question) is the square root of that product.
• So the square root of 49 is _____ and the square root of 36 is_____
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Square RootsA number that when squared equals the given number.
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Practice
• Quiz yourself http://www.studystack.com/studytable-5224
• Practice with a game of tic-tac-toe http://www.funbrain.com/cgi-bin/ttt.cgi
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Challenge
• If you were asked to approximate the square root of 10 what would you do?
• Take a few minutes brainstorm with your group.
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Challenge Response
• Use your knowledge that 3x3 gives you the perfect square 9, and 4x4 gives you the perfect square 16.
• The square root of 10 is then likely a decimal in the 3’s. You could approximate that the square root of 10 is 3.1
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Activity
• Create a floor plan for a square space. You must tile your floor with a tile amount that amounts to a perfect square. Once complete write the perfect square beneath your plan as well as the square root. Additionally you must label the dimensions of your square and label the room!