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sdt POS = 180 drjt(garis lurus)
sdt QOR = 180 drjt - (ROS + POQ)
= 180 - ( 45 + 90 drjt)
= 180 - 135
= 45 drjt
perbndingannya :
pos : qor = 180 : 45
= cari fpbnya dulu
= (180 : 45 ) : (45 : 45)
= 4 : 1
sdt POR = POQ + QOR
= 90 + 45
= 135 drjt
sdt POS = sdt POQ + QOR + ROS
= 90 + 45 + 45
=180 drjt