Square Roots and Number of Solutions

If I know the area of a square, how do I find the side length?

• I square the area.

• I divide the area by 2.

• I take the square root of the area.

• I divide the area by 4.

What is the side length of a square that has an area of 36?

• 9

• 18

• 6

• 1296

What is the side length of a square that has an area of 40?

• 20

• 10

• 1600

• 6.3

What is the perimeter of a square that has an area of 81?

• 9

• 36

• 18

• 81

What is the area of a square with a side of 7?

• 14

• 28

• 49

• 64

What is the area of a square with a side of 3.8?

• 7.6

• 38

• 15.2

• 14.44

Which of the following is a perfect square?

• 39

• 6

• 50

• 81

Evaluate 8²

• 68

• 64

• 16

• 56

Which of the following is NOT a perfect square?

• 49

• 64

• 200

• 100

Evaluate 15²

• 196

• 256

• 225

• 289