Splash Screen. Lesson Menu Five-Minute Check (over Lesson 1–2) Main Idea and Vocabulary Example 1:Find Squares of Numbers Example 2:Find Squares of Numbers.

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Splash Screen

Lesson Menu Five-Minute Check (over Lesson 1–2) Main Idea and 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

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

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

1.A 2.B 3.C 4.D Example 1 A.2.65 B.14 C.49 D.343 Find the square of 7.

Example 2 Find Squares of Numbers Find the square of 19. Method 1Use paper and pencil. Answer: ENTER = x2x2 361 Method 2Use a calculator. Multiply 19 by itself. 19  Annex a zero

1.A 2.B 3.C 4.D Example 2 A.4.58 B.42 C.121 D.441 Find the square of 21.

KC

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

1.A 2.B 3.C 4.D Example 3 A.8 B.32 C.640 D.4,096 Find

Example 4 Find Square Roots Find Answer: Use a calculator. 676 ENTER = 2nd 26

1.A 2.B 3.C 4.D Example 4 A.16 B.23 C.529 D.279,841 Find

Example 5 GAMES A checkerboard is a square with an area of 1,225 square centimeters. What are the dimensions of the checkerboard? The checkerboard is a square. By finding the square root of the area, 1,225, you find the length of one side of the board. Answer: So, a checkerboard measures 35 centimeters by 35 centimeters. Use a calculator ENTER = 2nd 35

1.A 2.B 3.C 4.D Example 5 A.12 ft × 14 ft B.14 ft × 14 ft C.16 ft × 16 ft D.20 ft × 20 ft GARDENING Kyle is planting a new garden that is a square with an area of 196 square feet. What are the dimensions of Kyle’s garden?

End of the Lesson

Resources Five-Minute Check (over Lesson 1–3) Image Bank Math Tools Arithmetic Sequences Modeling Algebraic Expressions Function Machines

1.A 2.B 3.C 4.D Five Minute Check 1 A.5 ● 3 B.5 ● 5 ● 5 C.3 ● 3 ● 3 ● 3 ● 3 D.5 ● 5 ● 5 ● 5 ● 5 (over Lesson 1-2)

1.A 2.B 3.C 4.D Five Minute Check 2 (over Lesson 1-2) A.2 ● 6 B.6 ● 6 C.2 ● 2 ● 2 ● 2 ● 2 ● 2 D.6 ● 6 ● 6 ● 6 ● 6 ● 6

1.A 2.B 3.C 4.D Five Minute Check 3 (over Lesson 1-2) A.512 B.312 C.64 D.24

1.A 2.B 3.C 4.D Five Minute Check 4 (over Lesson 1-2) A.10 B.25 C.32 D.64

1.A 2.B 3.C 4.D Five Minute Check 5 (over Lesson 1-2) A.30 3 per hour B.10 3 per hour C.3 3 per hour D.1 3 per hour A certain type of bacteria reproduces at a rate of 10 ● 10 ● 10 per hour. Write the rate at which this bacteria reproduces in exponential form.

1.A 2.B 3.C 4.D Five Minute Check 5 (over Lesson 1-2) A.seven times eight B.eight times seven C.eight to the seventh power D.seven to the eight power Write 8 7 in words.

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