Square Roots

9.1

Day 2

Essential Questions

What is the difference between an irrational number and a rational number?

How are real numbers and the Pythagorean Theorem used in everyday life?

What types of real-life situations could the Pythagorean Theorem or square roots apply to? Why?

Perfect Square

What is a perfect square?

How do I know if a number is a perfect square?

GUIDED PRACTICE for Examples 1 and 2

Find or approximate the square root to the nearest integer.

1.

23 2. 41= 4.7958

= 6.40312

GUIDED PRACTICE for Examples 1 and 2

Find or approximate the square root to the nearest integer.

1.

23 2. 41

ANSWER

6

ANSWER

5

= 4.7958= 6.40312

Daily Homework Quiz For use after Lesson 9.1

Use a calculator to approximate the square root. Round to the nearest tenth.

1. 38√ 2. 95.8√= 6.1644 = 9.7877

Daily Homework Quiz For use after Lesson 9.1

Use a calculator to approximate the square root. Round to the nearest tenth.

ANSWER 6.2

1. 38√ 2. 95.8√

ANSWER 9.8

= 6.1644 = 9.7877

Daily Homework Quiz For use after Lesson 9.1

Find the square root.

4.

–25

81

3.

16

49

Daily Homework Quiz For use after Lesson 9.1

Find the square root.

4.

–25

81

3.

16

49ANSWER

4

7

ANSWER5

9–

Evaluate - Simplifying

25

64

36

225

144

100

=

=

=

Evaluate - Simplifying

5

825

64

36

225

144

100

=

=

=

6

15

12

10=

11

5

2

5=

21

10=

Homework

Page 472 #1-20, 42-45, 54-57