Unit 2 Square Root Challenge (M7)

• 10

• 11

• 12

• 13

Answer explanation

Remember that 12 x 12 = 144

Tags

CCSS.8.EE.A.2

Answer explanation

...because 12 x 12 = 144

Tags

CCSS.8.EE.A.2

• 9

• 11

• 13

• 15

Answer explanation

....the square root of 81 is 9, because 9 x 9 = 81

Tags

CCSS.8.EE.A.2

Answer explanation

...because 9 x 9 = 81

Tags

CCSS.8.EE.A.2

• 15

• 16

• 17

• 18

Answer explanation

...because 16 x 16 = 256

Tags

CCSS.8.EE.A.2

Answer explanation

...because 16x16 = 256

Tags

CCSS.8.EE.A.2

Which of the following is NOT a perfect square?

• 144

• 256

• 117

• 81

Answer explanation

Think about square roots. If you took the square root of all of those numbers, one of them would have decimals in the answer. In fact, the square root of 117 is 10.186 ...

Tags

CCSS.8.EE.A.2

Which of the following is NOT a perfect square?

• 256

• 25

• 36

• 99

Answer explanation

Think about square roots. If you took the square root of all of those numbers, one of them would have decimals in the answer. In fact, the square root of 99 is 9.949 ...

Tags

CCSS.8.EE.A.2

Which of the following is NOT a perfect square?

• 88

• 25

• 36

• 256

Answer explanation

Think about square roots. If you took the square root of all of those numbers, one of them would have decimals in the answer. In fact, the square root of 88 is 9.380 ..

Tags

CCSS.8.EE.A.2

This figure shows the relationship between a perfect square and its square root. Complete the statement below that describes the relationship.

The square root of 81 equals ​ (a)   because the square root is represented by the​ (b)   of the square.

• 9
• SIDE LENGTH
• 11
• 12
• 7
• PERIMETER

Answer explanation

81 is a perfect square, and the area of the big square is 81 little squares. Each SIDE LENGTH is the same. The square root of the area (81) is 9, which equals the length of any side of the square. Count the squares on any side and see!

Tags

CCSS.8.EE.A.2