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BELLWORK!!!!

BELLWORK!!!!. Which inequality is correct? A) -4>-2 B) 1<-9 C) -8>7 D) -6<-5. HW REVIEW. Timed Skill Drill. Squares & Square Roots. DCMS Rocks!. Finding squares and square roots. If the length of one side of a square is 2, then its area is _______?.

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BELLWORK!!!!

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  1. BELLWORK!!!! • Which inequality is correct?A) -4>-2 • B) 1<-9 • C) -8>7 • D) -6<-5

  2. HW REVIEW Timed Skill Drill

  3. Squares & Square Roots DCMS Rocks!

  4. Finding squares and square roots If the length of one side of a square is 2, then its area is _______? If the length of one side of a square is 3, then its area is_______ ? If the length of one side of a square is 4, then its area is_____? 12 = 1 22 = 4 32 = 9 42 = 16 If the area of a square is 4, then the length of one side is_____? If the area of a square is 9, then the length of one side is____? If the area of a square is 16, then the length of one side is_____?

  5. The symbol for the principal, or positive square root, √ is called the radical sign. 52 = 25 If the length of one side of a square is 5, then its area is______? Given: area = 25 Length of side = √25 = 5 For any positive integer there are two square roots, one positive and one negative.

  6. Radicala radical is a root (like a square root) of a number. A radical is made up of a radical sign and something inside called the radicand.

  7. We discussed earlier that the inverse of an operation would “undo” that operation. The inverse operation of squaring a number is the square root ( √) of that number.

  8. Perfect Squares 1 = 1 x 1 = 12 4 = 2 x 2 = 22 9 = 3 x 3 = 32 16 = 4 x 4 = 42 25 = 5 x 5 = 52 = 6 x 6 = 62 = 7 x 7 = 72 = 8 x 8 = 82 = 9 x 9 = 92 100 = 10 x 10 = 102 Radicals (square roots) √1 = 1 √4 = 2 √9 = 3 √16 = 4 √25 = 5 √36 = 6 √49 = 7 √64 = 8 √81 = 9 √100 = 10 You need to remember:

  9. Finding and Approximating Square Roots

  10. Find two consecutive integers between which √58 can be found. 7 x 7 = 49 too small 8 x 8 = 64 too large Thus, √58 is between 7 and 8. Using a calculator, √58 = 7.62 Find two consecutive integers between which –√77 can be found. Find two consecutive integers between which √35 can be found.

  11. Closure • What does the SQUARE of a number represent? • What does the SQUARE ROOT of a number represent?

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