7 ( )
A 40 B
C 100 D
8 ABC AB AC A120BC6 cmAB BC M AB
EAC BC N AC F MN ( )
A4 cm B3 cm C2 cm D1 cm
9 AB BCDCBCEBC BAE DEC60AB 3CE4 AD
( )
A10 B12 C24 D48
10 ABC AB ACAD ABC DEAB DFAC E
F AD CB AD AB AC
BDCDAD BC BDE CDF. ( )
A1B2C3D4
(10 )
(12 )
(13 )
(15 )
( 3 24 )
11 __________________________
________
12. ABC AB AC A40 DAC BD BC ABD ________
13 AB AC AD AE AFBC F ________
14. 60
________________________________ ______________________________
15. ABC AD CE H CHAB ACB ________
16. RtABC C90AD CAB CD3AB 10 ABD ________
