This document contains a lesson on finding the area of composite figures. It includes an introduction, learning outcomes, examples of calculating areas of shaded regions within composite figures like rectangles and trapezoids, and practice problems for students to solve. The lesson aims to teach students to calculate the total area of an object by finding the individual areas of each shape within it and adding them together.

1. Welcome
Md. Abdul Quddus
Department: Mathematics
Campus : 05

2. Chapter : Three
Lesson declaration

3. Chapter : Three
Lesson declaration

4. Learning outcome
At the end of this lesson students will be able. .
 to find the area of composite figure.

5. Example
Find the area of the shaded region.
15 ft
20 ft
7 ft
7 ft
Area Whole Rectangle
Area Unshaded Square
Area Shaded Region

6. Try This
Find the area of the shaded region.
Area Trapezoid
Area Rectangle
Area Shaded Region
20 m
12 m
3 m
8 m
2 m

7. 100 Find the area of the shaded region.
6'
8'
2'
4'
Area Whole Rectangle
Area Unshaded
Area Shaded Region

8. 101 Find the area of the shaded region.
11"
12"
8"
7"
6"
Area Parallelogram
Area Triangle
Area Shaded Region

9. 12"
14"
8"
6"
8"
4"
102 Find the area of the shaded region.
Area Whole
Area Rectangle
Area Shaded Region

10. A cement path 3 feet wide is poured around a
rectangular pool. If the pool is 15 feet by 7
feet, how much cement was needed to create
the path?
Evaluation

11. Ex: A walkway 2 m wide surrounds a
rectangular plot of grass. The plot is 30 m
long and 20 m wide. What is the area of
the walkway?
20
30
2
2
Home Work