1. Section 11-4: Areas of Regular Polygons and Composite Figures
Let’s draw a regular polygon and its:
Center
Radius
Central angle
Apothem

2. Section 11-4: Areas of Regular Polygons and Composite Figures

3. Section 11-4: Areas of Regular Polygons and Composite Figures
Example: In the polygon below, JKLMNP is inscribed in ⨀R. Identify:
Center
Radius
Central angle
Apothem
Measure of central
angle

4. Section 11-4: Areas of Regular Polygons and Composite Figures
Example:

5. Section 11-4: Areas of Regular Polygons and Composite Figures

6. Section 11-4: Areas of Regular Polygons and Composite Figures
Example:

7. Section 11-4: Areas of Regular Polygons and Composite Figures
A composite figure is a figure that can be separated into regions of basic figures, such as triangles, rectangles, trapezoids and circles.
To find the area, find the area of each basic figure and then add them together for total area.

8. Section 11-4: Areas of Regular Polygons and Composite Figures
Example:

9. Section 11-4: Areas of Regular Polygons and Composite Figures
Example:

10. Section 11-4: Areas of Regular Polygons and Composite Figures
Homework:
Pages 811 – 813
#8 – 24 all, not #18, #21, #23.
***NOTE: #24 is CHALLENGING