16 + 20 + 9 + 15 = 60
sp nya diketahui dengan cara mencari triple pythagoras dari sq
PQ = 9 cm
QR = 20 cm
RS = 16 cm
K bangun datar
= PQ + QR + RS + SP
= 9 + 20 + 16 + V(QR^2 - RS^2 + PQ^2)
= 45 + V(20^2 - 16^2 + 9^2)
= 45 + V(400 - 256 + 81)
= 45 + V225
= 45 + 15
= 60 cm (B)
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16 + 20 + 9 + 15 = 60
sp nya diketahui dengan cara mencari triple pythagoras dari sq
PQ = 9 cm
QR = 20 cm
RS = 16 cm
K bangun datar
= PQ + QR + RS + SP
= 9 + 20 + 16 + V(QR^2 - RS^2 + PQ^2)
= 45 + V(20^2 - 16^2 + 9^2)
= 45 + V(400 - 256 + 81)
= 45 + V225
= 45 + 15
= 60 cm (B)