## Monday, December 7, 2009

### Squares

Square Roots - side measure of a square . The number I can square to get the area of a square .

• The square of a number is the number multiplied by itslef .
5 x 5 = 25 or 5 square = 25
• The square of a whole number is a perfect square . 2 square = 4
so , 4 is a perfect square .
• The square of a number can be thought of as the area of a square .
4 square = 16
The area is 16 cm square
• The square root of a number can be thought of as the side length of a square .
√16 = 4
The side length is 4 cm .
• The square root of a value is a number that when by itself equals the value
6 x 6 = 36 , so √36 = 6
• In the prime factorization of a perfect square , there is an even number of each prime factor.
36 = 2 x 2 x 3 x 3 (two factors of 2 , two factors of 3 )

Question :

4. Estimate the square root of each number , to one decimal place . Check with a calculator.

a) 72 b) 103 c)55

- a) 8.5 b) 10.1 c) 7.4

Eric.P 8-73

Good job Trixie. Next time try to explain how you got the answer.

Alexander8-73

Nice job Trixie and like Eric said explain how you got the answer

Jemineth873

Good job trixie, you just need to include explanations , to how you got the answer,