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luas adc = 50 % lebih besar dari adc = 1,5 kali
luas adc = 24 x 1,5 = 36...
luas abc = luas abd + adc = 24 + 36 = 60..
skarang cari panjang bc ..
luas abc = ab x bc / 2
60 = 8 x bc / 2
bc = 120/8 = 15
cari panjang ac ...
ac² = ab² + bc²
ac² = 8² + 15²
ac² = 64 + 225
ac² = 289
ac = 17
dc = bc - bd = 15 - 6 = 9
cari ad ,--> pake rumus phytagoras dari bd sama ad
ad = 10.
keliling adc = 10 + 9 + 17 = 36 cm
jadi keliling adc = 36 cm
moga ngerti..