Squares and Square Roots

1
3-8
Squares and Square Roots
Warm Up
Problem of the Day
Lesson Presentation
Pre-Algebra
2
Warm Up Simplify.
25
64
1. 52 2. 82
3. 122 4. 152
144
225
400
5. 202
3
Problem of the Day A Shakespearean sonnet is a
poem made up of 3 quatrains (4 lines each),
and a couplet (2 lines). Each line is
in iambic pentameter (which means it has 5 iambic
feet). So, how many iambic feet long is a
Shakespearean sonnet?
70
4
Squares and Square Roots
Learn to find the square root.
Math fact Addition is the inverse operation
of subtraction Multiplication is the inverse
operation of subtraction
Square root is the inverse operation of
squaring a number
5
(No Transcript)
6
Find the square root of each number.
C. 225
B. 100
A. 49
F. 289
E. 144
D. 625
7
A square window has an area of 169 square inches.
How wide is the window?
A 169 in2
169 in2 s2
13 in s
The window is 13 inches wide.
8
A square shaped kitchen table has an area of 16
square feet. Will it fit through a van door that
has a 5 foot wide opening?
A 16 ft2
16 ft2 s2
4 ft s
The table will fit through the door.
9
Evaluate the expression.
B. 21 5 9
A. 3 36 7
10
Evaluate the expression.
B. 41 5 5
A. 2 25 4
11
Lesson Quiz
Find the square root of each number. 1. 81 2.
2500 Evaluate each expression. 3. 3 16 1 4.
7 9 2 49
9
50
7
13
5. Ms. Estefan wants to put a fence around 3
sides of a square garden that has an area of 225
ft2. How much fencing does she need?
45 ft
12
Homework

• Pg 148
• 1 47 odd
• 51 60 all