Download Squares and square roots

Objective:
Find squares of numbers and square roots
of perfect squares.
• The Area of the square at
the right is 5●5 or 25
square units.
• The product of a number
and itself is the square of
that number.
• So, the square of 5 is 25.
Examples: 1) Find the square of 3.
2) Find the square of 15.
 Numbers
like 9, 16, and 25 are called square
numbers or perfect squares because they
are squares of whole numbers.
 For
Example:
9=3●3
16 = 4 ● 4
25 = 5 ● 5
 The
factors multiplied to form a perfect
square are called square roots.
 A radical sign √ is the symbol used to indicate
a square root of a number.
 A square root of a number is one of its two
equal factors.
For example: 4 ● 4 = 16, so the √16 = 4
Examples: Find √81
Find √225
Find the square of
each number.
1.
2.
3.
4.
5.
6.
7.
8.
4
1
7
11
16
20
18
34
Find each square root.
9. √4
10. √16
11. √49
12. √100
13. √144
14. √256
15. √529
16. √625