Geometry: An Interactive Journey to Mastery

4. D௘ͽ 3RVVLEOH௘6HHFigure S.3.1௘
   E௘ͽ 1R7ZRREWXVHDQJOHVDGGXSWRPRUHWKDQƒLQDWULDQJOH
   F௘ͽ 1R,IWZRDUHQRWSRVVLEOHWKHQWKUHHFHUWDLQO\DUHQRW


5. ii. +GMI.
   iii. +LRI.
   iv.  
    
   mG xy
   mL xy

‘ 

‘ 

7. ௘‘L is divided into two congruent angles by LM. Label each x.
   x JLYHVx VRx 
   Thus, mMLU‘ ƒ


8. i. x + y 
   ii. y + z EHFDXVHORAOS.
   LLL 6Rx + y = y + z, giving x = z.

140°

Figure S.3.1

15°

75°15°90°75°

W

S

I

H Figure S.3.2

M U

L

G^1030

x x

Figure S.3.3