Jawabanmu

2014-03-12T19:31:31+07:00
A) AC = √(AB² + BC²) = √(4² + 8²) = √80
AC = 4√5 cm
dengan perbandingan luas
½(AB*BC) = ½(AC)t → t : jarak
½(4*8) = ½(4√5)t
16 = (2√5)t
t = 8/√5 = (8/5)√5 cm

b) CF = √(10² + 8²) = √164
CF = 2√41
½(GF*CG) = ½(CF)t
½(8*10) = ½(2√41)t
t = 40/√41 = (40/41)√41 cm
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