1. I can…
…Identify and name polygons.
…Find perimeter or circumference and area of two-dimensional figures.

2. Polygon
A closed figure formed by a finite number of coplanar segments such that:
1. Sides that have a common endpoint are noncollinear.
2. Each side intersects exactly two other sides, but only at their endpoints.
Named by the letters of its vertices (alpha order)

3. Located on Page 50 of Textbook.

4. Convex vs. Concave

5. Identify the polygon by the number of sides. Is it convex or concave?

6. Regular Polygon
All angles are congruent
All sides are congruent

7. Identify the polygon by the number of sides. Is it convex or concave
Identify the polygon by the number of sides. Is it convex or concave? Is it regular?

8. Shape
Perimeter/
Circumference
Area
Triangle
Square
Rectangle
Circle

9. Find the perimeter of a pentagon ABCDE with A(0, 4), B(4, 0), C(3, –4), D(–3, –4), and E(–3, 1).
How might you find the area?

10. Practice
Pg. 54
#2-44E, 48