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Kelas 8 Matematika
Bab Bangun Datar

RP = √(PO² – OR²)
RP = √(13² – 5²)
RP = √(169 – 25)
RP = √144
RP = 12 cm

Luas ORPQ
= 2 . 1/2 . OR . RP
= 5 . 12
= 60 cm²