Sewanhaka High School
Math 8
Name:__________________________
Mrs. Lidowsky, Principal
Mr. Long, Teacher
Per:____
Date:_____________________
H.W. #75: Ditto
DO-NOW #75: Answer the following questions:
1) Subtract: 27 - 3 =
2) Add: 9 2 +
32 =
3) For a school fair, each class is making a class flag. Each flag requires 2⅔ yards of fabric. If there are 21 classes,
how many yards of fabric will be needed to make all the flags?
Topic: Radicals and the Right Triangle
Main Idea: Multiplying and Dividing Radicals
Aim:
RECALL
NOTES
)'s pool is in the shape of a
(
rectangle. It is 5 3 feet long and 4 2 feet
wide.
How much tarp will (
) need
to cover the pool with? What do you need to
know about the top of the pool?
Multiply 3 6 • 5 2 and write the product in
simplest radical form.
Find the (2 3 )2.
Go back to the area question, 5 3 • 4 2 =
(5 • 4)( 3 2 ) = 20 6 (multiply coefficients and
then radicands)
How would you check that question?
Divide
72 by
8.
The area of the following rectangle is
70 square meters. The length of the
rectangle is 10 square meters. Find the
width of the rectangle
Simplify 3 2 (4 3 + 6 2 )
Simplify 5 3 (3 2 -
3)
Find the area of the rectangle in simplest
radical form.
Drill: Answer the following questions
Multiply or divide each set of radicals and then simplify your answer if possible.
2) 14 • 2 =
1) 3 • 3 =
3)
72 ÷
2 =
5a) 3 2 * 2 6 =
Summary:
To multiply two monomials with radicals:
To divide two monomials with radicals:
If time:
4)
24 ÷
2 =
5b) 3 5 (2 5 + 5 3 ) =