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Each box covers 252 feet What does this mean? How do I find out how much I need? So squared or ft2 is a measurement.... can I make a perfect square shape with this box of laminate? What is a square? Can you use the paper provided to make a perfect square? Can you divide the sides equally ? Can you connect lines to each side? How many smaller squares can you count? You just made a Squared Number! so 32 is 9 squares Math 8 Square Numbers NAME ? Sept. 2013 Can I add Lines to this square to make exact equal other squares? Any time you can arrange numbers or objects into perfect squares, we call them square numbers NAME ? September __ 2013 What is a Power? 31 32 33 34 35 SQUARED is another name for the "the power of 2" 52 = 5 X 5 = 25 Why are they called SQUARE numbers http://www.youtube.com/watch?v=bg0OVOo-PAw Square Roots of Perfect Squares 144 m2 How would I find the length of the sides of this square mat? * We know it is a perfect square in a square all sides are equal to find AREA , L Χ W We have to find the length of one side, 1) guess and check try 9, 9Χ9 = 81 102= 112= 122= 2) Use your calculator to find the "square root" square root - one of two equal numbers factors of and for a number √49 = 7 √100 = 10 http://www.ted.com/talks/arthur_benjamin_does_mathemagic.html 144 m2 √144 = 12 The square of 29 is 841 What is the square root of 841? The square root of a perfect square is 16 What is the perfect square? Textbook Page 14 6, 8, 9, 10, 11, 16, 17 Estimate Square Roots Estimate- an educated and calculated response to a math question, usually by rounding decimal numbers. A square floor has an area o 85m2 85 m2 About how long are the sides of the wall? what multiplied by itself is close to 85? THINK 92 = 9 x 9 = 81 102 = 10 x 10 = 100 9.22 √ 85 = 9.21 The length of the sides of the square is about 9.2 m. Try these: Estimate each square root to one decimal place √ 27 5.2 √ 56 7.5 √ 416 20.4 Page 118 1,2,4,5,,7,8,9,10, 12,13,14,15 Squared Numbers Quiz NAME______________ Fill in the blank 52=____ 32=____ √ 81=____ √ 121=___ Estimate the Square Root √ 40 = ____ √ 95=____ 95 m 2 A square carpet has an area of 95 m2. Estimate the length of each side. SIDE _________