1. Let’s review ?

2. What are these? A
point A A B A B
line AB
segment AB

3. What are these?

4. What are these in Korean?
Polygons
다각형

5. Quiz
What is a polygon with
3 points &
3 segments ?
It is a triangle .

6. Today’s lesson is …
Let’s study ?
꼭지점 ? 변
in a polygon.

7. What are these in English?
꼭지점
vertex 변
side

8. How many vertices ?
three
vertices
one vertex
two vertices

9. How many sides ?
three
sides
one
side
two sides

10. Triangle ABC How can we call this triangle? Vertex A Side AB Side CA
Vertex B
Side BC
Vertex C

13. Vertices and sides Rectangle What did you learn today? Side DA
Vertex D
Vertex A
Side AB
Rectangle
Side CD
Vertex B
Vertex C
Side BC