Question

Хэлп ми плиз, люди добрые

Answer 1

\sqrt{AH^2 + CH^2} =  \sqrt{80} СМ  = AC/2 =  \sqrt{20}ACE = atan(4/8)KCH = atan(3/4) ACB = KCH+ACECBM = 90-ACBCM/sin(CBM) = BM/sin(ACB)BM = (CM/cin(CBM))sin(ACB)BM = \sqrt{80]S = BM * AC/2 = 40