1. 81 = 9 81 = 9 2 COURSE 2 LESSON 8-5 Simplify 81. 8-5 Square Roots and Irrational Numbers

2. The area of a square park is 36 m 2. What is the length of each side? 6 = s Simplify. COURSE 2 LESSON 8-5 A = s 2 Use the formula for the area of a square. 36 = s 2 Substitute 36 for the area.Take the square root of each side. 36 = s 2 The length of each side of the square park is 6 m. 8-5 Square Roots and Irrational Numbers

3. 60 is between 7 and 8. Estimate the value of 60. COURSE 2 LESSON 8-5 Find perfect squares close to 60. 49 < 60 < 64 Simplify. 7 < 60 < 8 60 8. Since 60 is closer to 64 than it is to 49, 8-5 Square Roots and Irrational Numbers