This document contains notes from a math class that covered the following topics: - Formulas for calculating the perimeter and area of triangles. - Practice problems working with triangles, fractions, decimals, and expressions. - An upcoming test on these topics and reminders for students to have the proper materials and not share answers during the test.

1. October 15, 2015
Formulas
Warm-Up
Review Khan Academy
Take Test
Today:

2. Formulas Section of Notebook
Triangles: The perimeter of a triangle is:
S + S + S
The area of a triangle is: ½(base x height) or,
base x height
2
½(4 x 3) = 4 x 3
2
The dimensions of a triangle
are shown. What are the
lengths of each side of the
triangle?
P = 43

3. Find the area of the given triangle?
Triangles, continued
h = 4
base = 3
½(base x height) or, base x height
2

4. Warm-Up
How is adding & subtracting mixed fractions different
from multiplying and dividing mixed fractions?

5. Warm-Up
xxx 2
6
5
2
1
3
2

3. (
𝒈
𝟑
) + (
𝟐
𝟓
) = (
𝟑
𝟐
) - g
The difference between two numbers is 43.
If the larger minus 43 equals the smaller, then
the smaller.........equals the larger.
The sum of twice the larger and three times the smaller is
246. What are the numbers?

6. Writing & Interpreting Decimals:

7. Writing & Interpreting Decimals:

8. Writing & Interpreting Decimals:

9. Are there questions about simplifying
expressions or +, -, ∙, or ÷ fractions and
decimals?

10. You will need:
 A Pencil(or two)
Scratch Paper with your name
 Your correct code
 Calculator optional
Please clear your desks of everything
else and listen for
instructions for entering your code
If you have a question during the test,
ask me, not your neighbor.