1. Math CC7/8 – Sept. Things Needed Today (TNT):
Math Notebook/Pencil/Angle Ruler or Protractor
Math Book –Shapes & Designs 2.4 pg. 49
Labsheet 2.4 A&B (located on table by the door)
Learning Log:
Topic: Ins & Outs of Polygons
HW: S &D pg.54 #12, 14, 15 & Triangle WS

2. What’s Happening?
Warm Up
Lesson- S&D 2.4!
Start Homework

3. Warm-Up
WRITE down each problem & SOLVE
Show ALL your work & THINKING

4. Check your work in a different colored pen or color pencil
Answers to Warm Up
Check your work in a different colored pen or color pencil

5. Shapes & Designs, p. 49
Take Notes

6. Take Notes

7. The cyclist will have made 1 complete turn
The cyclist will have made 1 complete turn. Therefore the exterior angles is 360°.

8. If finish, begin 2.4 B

10. Sum of the INTERIOR angles is:
S = (n -2) 180
S = (5 – 2) or S = 3(180)
Sum of the EXTERIOR angles is 360 , but we can view that as 2(180)
So… total sum of interior and exterior angles (T) is:
T = 3(180) + 2(180) or T = (3+2)180
= T = 180(5)

11. T = 180n – 360 is the total interior angle measure.
The 360 can be thought of as 180(2).
T = 180n – 180(2)
Using the Distributive Property, we can now see that we have the formula developed in lesson 2.2, which is T = (n-2)180

12. 3(180) = 540°
360
3(180) – 360 = 180
Total – exterior = interior

13. x + 2x + 3x = 180
6x = 180
x = 30
x = 30, 2x = 60, 3x = 90
Supplements:
x + 2x + x – 20 = 180
4x - 20 = 180
4x = 200
X = 50, 2x = 100, x – 20 = 30
Supplements:

14. S&D p. 54 #12, 14, 15 & Triangle Worksheet (SHOW ALL WORK)
Start Homework
S&D p. 54 #12, 14, 15
&
Triangle Worksheet
(SHOW ALL WORK)