Math: Squares and Square Roots, Lesson 18

The square root of 1 is

1

1 squared is written

1 x 1 = 1

The square root of 100 is

10

10 squared is written

10 x 10 = 100

10 squared =

100

The square root of 121 is

11

11 squared is written

11 x 11 = 121

The square root of 144 is

12

12 squared is written

12 x 12 = 144

11 squared =

121

Use a calculator to solve: the square root of 169 =

13

Use a calculator to solve: the square root of 196 =

14

12 squared =

144

Use a calculator to solve: the square root of 225 =

15

4 squared =

16

Use a calculator to solve: the square root of 256 =

16

Use a calculator to solve: 13 squared =

169

Use a calculator to solve: the square root of 289 =

17

Use a calculator to solve: the square root of 324 =

18

Use a calculator to solve: the square root of 361 =

19

Use a calculator to solve: 14 squared =

196

The square root of 4 is

2

2 squared is written

2 x 2 = 4

Use a calculator to solve: the square root of 400 =

20

Use a calculator to solve: 15 squared =

225

5 squared =

25

Use a calculator to solve: 16 squared =

256

Use a calculator to solve: 17 squared =

289

The square root of 9 is

3

3 squared is written

3 x 3 = 9

Use a calculator to solve: 18 squared =

324

6 squared =

36

Use a calculator to solve: 19 squared =

361

2 squared =

4

The square root of 16 is

4

Mom's waffle iron makes square waffles. Each waffle has 16 squares. How many squares are along one side of each waffle?

4 squares are along each waffle side because the waffle is a square and the square root of 16 is 4.

4 squared is written

4 x 4 = 16

Use a calculator to solve: 20 squared =

400

7 squared =

49

The square root of 25 is

5

5 squared is written

5 x 5 = 25

The square root of 36 is

6

6 squared is written

6 x 6 = 36

8 squared =

64

The square root of 49 is

7

7 squared is written

7 x 7 = 49

The square root of 64 is

8

8 squared is written

8 x 8 = 64

9 squared =

81

3 squared =

9

The square root of 81 is

9

9 squared is written

9 x 9 = 81

The Pythagorean theorem is read

a squared plus b squared = c squared

The longest side (opposite the right angle) is

called the hypotenuse.

The other two sides are

called the legs.

A square root is

one of a number's two equal factors.

Finding the square root of a number is

the inverse of squaring a number.

When a whole number is squared

the product is a perfect square.

A square is

the product of a number times itself.

Since 5 squared = 25,

the square root of 25 is 5.

In a right triangle,

the three sides are related.

The exponent 2 is

used to express a number squared.