Transcript Rational vs. Irrational numbers

Wednesday 8.28.13
Directions: Please come in and get your journal. Skip 2 pages (front and
back is 1 page). On the front side of the 3rd page, write today’s date on the
top line. Below the date, write the Challenge Question.
Challenge Question: What math symbols do you know and how do
they benefit you?
Warm-up (independent, level 0 noise): You have 20 feet of fencing and
you want to build a dog kennel that is a perfect square. What will the side
lengths be?
Please complete this in your journal below the CQ
Vocabulary words
• Discuss the following math vocabulary with
your group for 2 minutes. What does each
word mean and how can we evaluate it?
Side length
Perimeter
Area
Perfect square
Our Dog Kennel
Side length = 5 ft.
Perimeter = 20 ft.
Area = 25 ft²
Perfect square = Yes!!
Squares and Square Roots
• Square Root: A number that produces a
specified quantity when multiplied by itself.
Example: 8² = 64
Why doesn’t 8² = 16? Discuss with your group
for one minute.
Exponents
What is an exponent?
• A quantity (or number) representing the power to
which a given number is to be raised.
What are some examples of exponents?
 2² = 4
 3² = 9
 4² = ?
 5² = ?
 6² = 36
 2³ = 8
 3³ = ?
 4³ = 64
 5³ = ?
 6³ = 216
Rational vs. Irrational numbers