1. 11.4 Areas of Composite Figures
Objectives: Find areas of composite figures.

2. composite figures
Figure that can be separated into regions that are basic figures
The area of a region is the sum of all the areas of the regions nonoverlapping parts
Area of composite figure =
area of square + area of triangle + area of hexagon

3. Mrs. Smith needs a new sidewalk. Find the area.
6 ft.
The dashed line divides the sidewalk into a rectangle and a trapezoid.
Areasidewalk = Arect + Atrap
= bh ½ (b1 + b2)h
= (3)(11) + ½ (6+3)(4)
= 51 ft2
4 ft.
15 ft.
3 ft.

4. Find the area inside the track at the football field.
The region inside the track includes a rectangle and 2 semi-circles
Area = Arearect + 2Areasemi-circle
= bh + r2
= (140)(50) + (25)2
 yd2
50 yd
140 yd