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Square Roots
Perfect Squares
100
What is the square root of 4?
2
100
Which of the following is a perfect square? Answer and explain. A. 11 B. 20 C. 4 D. 8
C. because 2 x 2 = 4.
200
Solve. √49 =
7
200
What is the perfect square of 8? Explain.
64 because 8 x 8 = 64.
300
What is the square root sign (√) called?
A radical
300

What are the two different ways you can say 5^2?

"Five to the second power" and "five squared"

400
Solve. √9 x √121 =
33
400
Solve. (perfect square of 7) + (the perfect square of 3+) =
49 + 9 = 58.
500
Marissa's mom offered her three different options for her weekly allowance. Her three options are: A. √36 x 2^2 dollars a week B. √9 x √121 dollars a week C. √169 x 2 dollars a week How much would she make with each option? Which option should she chose? Explain your work.
She should chose option B because she would earn $33 a week (√9 = 3, √121 = 11, and 3 x 11 = 33). If she chose option A, she would only make $24 dollars (√36 = 6, 2^2 = 4, and 6 x 4 = 24), and if she chose option C, she would only make $26 a week (√169 = 13, and 13 x 2 = 26).
500
Explain why we call it a "Perfect Square." Be specific!
When finding the area of a square, you multiply length times width. In a square, all four sides are equal. Therefore, when you find the area of a perfect square, you are multiplying the same number by itself.