Geometry: An Interactive Journey to Mastery

Lesson 21: Understanding Area

F௘ͽ

12 35

(^37) Figure 21.10
 G௘ͽ 5

5

4 5

4

5

Figure 21.11

 Find the area of each of the following.

D௘ͽ $QLVRVFHOHVULJKWWULDQJOHZLWKK\SRWHQXVHLQFKHV

E௘ͽ $QHTXLODWHUDOWULDQJOHZLWKSHULPHWHULQFKHV

F௘ͽ $ULJKWWULDQJOHFRQWDLQLQJDƒDQJOHDQGZLWKK\SRWHQXVHLQFKHV

G௘ͽ $VTXDUHLQVFULEHGLQDFLUFOHRIUDGLXVr.

H௘ͽ $UHFWDQJOHZLWKOHQJWKLQVFULEHGLQDFLUFOHRIUDGLXV

 Here in )LJXUH, M is the midpoint of AB.

D௘ͽ :KDWFDQ\RXVD\DERXWWKHDUHDVRIWULDQJOHV,DQG,,"

E௘ͽ +ABC has area 50 square units, and BM = 10. What is the

height of +AMCͼ௘ZLWKAMFRQVLGHUHGLWVEDVH௘ͽ" AM B

C

III

Figure 21.12