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Lesson Menu. Main Idea and New Vocabulary Example 1: Find Squares of Numbers Example 2: Find Squares of Numbers Key Concept: Square Root Example 3: Find Square Roots Example 4: Find Square Roots Example 5: Real-World Example. Find squares of numbers and square roots of perfect squares.

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  1. Lesson Menu Main Idea and New Vocabulary Example 1: Find Squares of Numbers Example 2: Find Squares of Numbers Key Concept: Square Root Example 3: Find Square Roots Example 4: Find Square Roots Example 5: Real-World Example

  2. Find squares of numbers and square roots of perfect squares. • square • perfect squares • square root • radical sign Main Idea/Vocabulary

  3. Find Squares of Numbers Find the square of 5. 5 ● 5 = 25 Multiply 5 by itself. Answer: The square of 5 is 25. Example 1

  4. Find the square of 11. A. 5.2 B. 22 C. 110 D. 121 Example 1 CYP

  5. x2 ENTER 19 361 Find Squares of Numbers Find the square of 19. Method 1 Use paper and pencil. 19 Multiply 19 by itself. × 19 171 + 190 Annex a zero. 361 Method 2 Use a calculator. Answer: The square of 19 is 361. Example 2

  6. Find the square of 20. A. 40 B. 200 C. 400 D. 440 Example 2 CYP

  7. Key Concept 3

  8. Find 6 ● 6 = 36, so What number times itself is 36? Answer: Find Square Roots Example 3

  9. Find A. 2 B. 4 C. 8 D. 16 Example 3 CYP

  10. Find 2nd ENTER 676 26 Answer: So, Find Square Roots Example 4

  11. Find A. 17 B. 23 C. 27 D. 33 Example 4 CYP

  12. 33 ● 35 = 1,225, so GARDENS A city planner is designing a new community garden. The garden will be in the shape of a square and have an area of 1,225 square feet. What are the dimensions of the garden? The garden is a square. By finding the square root of the area, 1,225, you find the length of one side of the garden. Answer: The dimensions of the garden are 35 feet by 35 feet. Example 5

  13. PATIOS Philip is building a patio in the back yard. The patio will be square and will have an area of 225 square feet. What are the dimensions of the patio? A.2.25 ft by 2.25 ft B.15 ft by 15 ft C.25 ft by 25 ft D.112.5 ft by 112.5 ft Example 5 CYP

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