1. Problem of the Day Solve for y, justify your answer 15x + 15 9(x + 7)

3. It is not: What’s a polygon?
A polygon is a closed figure with straight edges
It is not:
In a regular polygon is all sides and angles are congruent

4. How many triangles can you make from one vertex?
How many degrees in one triangle?
There are ____________ degrees in a quadrilateral

5. How many triangles can you make from one vertex?
How many degrees in one triangle?
There are ____________ degrees in a pentagon

6. How many triangles can you make from one vertex?
How many degrees in one triangle?
There are ____________ degrees in a hexagon

7. How many triangles can you make from one vertex?
Number of sides 4 5 6 7 8 n
Number of triangles
formula
Number of degrees

8. The formula to find the number of degrees in ANY polygon is:
There are ____________ degrees in a 12 sided figure

9. Where am I going to use this information?

11. Sum exterior angles of any polygon = 360°

12. Exit Ticket Find all the angle measures x + 50° 2x + 32° 86° 3x - 7°