Geometry: An Interactive Journey to Mastery



8. ,Q'ABCWKHSRLQWP is 3 GRZQVLGHBADQGWKHSRLQWQ is  3 GRZQVLGHBC.
   ͼ௘6HHFigure 9.14௘ͽ
   D௘ͽ 3URYHWKDWPQLVSDUDOOHOWRAC.
   E௘ͽ 3URYHWKDWACLVWLPHVDVORQJDVPQ.


9. &RQVLGHUWKHGLDJUDPLQFigure 9.15.
   D௘ͽ ([SODLQZK\''ABCaBDC
   E௘ͽ (VWDEOLVKWKDWx^2 = yͼ௘yz௘ͽ


10. 8VHVLPLODUWULDQJOHVWRSURYHWKDWRSSRVLWHVLGHVRIDSDUDOOHORJUDPDUHFRQJUXHQW
    7KDWLVLQWKHSLFWXUHLQFigure 9.16SURYHWKDWx = y.
    +LQW'UDZDGLDJRQDOOLQH

A

P

B

Q

C

A Figure 9.14

BC

D

x

y

z

Figure 9.15

x

y

Figure 9.16