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TR=22 cm
TS=22-7=15
QR=25 cm=PS
caranya pake rumus phytagoras
djtanya TP=
TP=20. PS#25=5x5
TS#15=3x5
TP#20=4x5
phytagoras=345
8.DB=50
AC=24x2=96
50x96:2=2400 cm2
db=50
ef=48
50x48:2=1200 cm2
l daerah diarsir: 2400-1200=1200 cm2