Area of Regular Polygons

## Day 5

### Objectives:

Warm Up Activity:

#### Puzzling
Pentacle

A pentacle is a figure made up of five straight lines forming
a star. As those five lines form the star, they also form a five-sided figure,
called a pentagon, inside the star.

The pentacle to the left has been put inside another pentagon,
and together they form many triangles. How many triangles can you find in
this perplexing puzzle?

Click here for solution.

### Lesson Outline:

- Students will work in pairs at the computer. Each pair
will be responsible for completing the activity.