. .
1.
) ABD ABC , ABD. Ð BD, Ð = 40.
) , , , , , , . , Ð = 90.
) . , D ; = CD = BD. , =.
2.
) , , 162. .
) . D ; ÐDBE = 60, Ð = Ð. , .
B) CD , = OD. AD , Ð = Ð. , AOD .
3.
) Ð = 20, Ð = 100. D , ÐACD = 40. BCD.
) Ð = 100. 1 1 D. BDC.
) ; Ð = 70. Ð Ð.
. .
1.
) = . . MD . , rAMD = rBHE.
) 111. 1 , = 11. , r = r 111.
) , , 1, 1, 1 , 1, 1, 1 . 2, 2 2 ; 1 = 2, 1 = 2, 1 = 2. , 111 222 .
2.
) . , .
) BD , . . BD MDH. , = .
) BD ; ÐOAD = ÐOCD. , .
3.
) . , , , . , r = r.
) 111 D C1D1, ÐB = ÐB1 = 45, CD = C1D1, AB = A1B1. , r = r111.
) . D; MD = DH, ÐHAC = ÐMCA. ?
. .
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1.
) 27 , . .
) . , , . .
) , , . Ð = 140, Ð = 130, Ð = 60, Ð = 80. Ð.
2.
) Ð = 20, Ð = 100. D , ÐD = 40. BCD.
) Ð = 100. 1 1 D. BDC.
) ; Ð = 70. Ð Ð.
. .
) 8 , 38 . .
) . BD 8 . , ABD 24 .
) . BD, 36 , ABD 24 .
