**Page 84: Show You Know**

Determine the side length of a square with an area of 196 cm².

I used

**prime factorization**to answer this:

The side length of a square with an area of 196 cm squared is 14 cm².

**Page 85: Questions 3, 7, 12 and 14.**

3. The square root of 36 is 6 because out of all the factors, 6 multiplied by itself is the only one that equalled to 36.

7. a) 2x3x7 = 42 ; It

**is not**a perfect square.

b) 13x13 = 169 ; It

**is**a perfect square.

c) 2x2x2x2x2x2x2x2 = 256 ; It

**is**a perfect square.

12. Determine the square of each number:

a) 3x3 = 9

b) 18x18 = 324

14. Determine the side length of a square with an area of 900cm²

900 ÷ 30 = 30 ; 30x30 = 900cm²

The side length of a square with an area of 900cm² is 30 cm.

Here is a video on square roots.

Here is a link on square roots.