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Transparency 1. Click the mouse button or press the Space Bar to display the answers. Splash Screen. Example 1-4b. Objective. Find square roots of perfect squares. Example 1-4b. Vocabulary. Perfect Square. Any number that is a square of a whole number 1, 4, 9, 16, 25,. Example 1-4b.

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  1. Transparency 1 Click the mouse button or press the Space Bar to display the answers.

  2. Splash Screen

  3. Example 1-4b Objective Find square roots of perfect squares

  4. Example 1-4b Vocabulary Perfect Square Any number that is a square of a whole number 1, 4, 9, 16, 25, . . .

  5. Example 1-4b Vocabulary Square root One of a numbers two equal factors (the opposite of squaring a number)

  6. Example 1-4b Vocabulary Radical sign A symbol used to indicate the positive square root 81

  7. Example 1-4b Vocabulary Principal square root A positive square root

  8. Lesson 1 Contents Example 1Find a Square Root Example 2Find the Negative Square Root Example 3Use Square Roots to Solve an Equation Example 4Use an Equation to Solve a Problem

  9. Find Example 1-1a Write problem Use calculator Put 81 in calculator Push the  x key 81 [  x ] indicates the positive square root of 81. 9 Answer: 9 1/4

  10. Find Example 1-1b Answer: 8 1/4

  11. Example 1-2a Write problem Find Use calculator Put 144 in calculator Push the  x key 144 [  x ] indicates the negative square root of 144 -12 12 Answer: -12 2/4

  12. Example 1-2b Find Answer: ─ 6 2/4

  13. ALGEBRA Solve Example 1-3a Write the problem Ask “what is being done to the variable?” The variable is being squared Do the inverse on both sides of the equal sign The inverse of squaring is finding the square root 3/4

  14. ALGEBRA Solve Example 1-3a Find Bring down the equal sign Find 49 Find 64 x = Since same sign when multiplying integers is a positive answer there are 2 solutions Answer: 3/4

  15. ALGEBRA Solve Example 1-3b Answer: 3/4

  16. MUSICThe art work of the square picture in a compact disc case is approximately in area. Find the length of each side of the square. A = 14,161 = Example 1-4a Words Area is equal to the square of the length of a side. Variable Equation 4/4

  17. Example 1-4a Ask “what is being done to the variable?” 14,161 = s2 The variable is being squared Do the inverse on both sides of the equal sign The inverse of squaring is finding the square root 119 119 = s Find 14,161 Find s Answer: Length of side = 119 mm 4/4

  18. Example 1-4b * ART A piece of art is a square picture that is approximately 11,025 square inches in area. Find the length of each side of the square picture. Answer: length of side = 105 inches 4/4

  19. End of Lesson 1 Assignment

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