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= √256 + 144 = √400 = 20 cm
PQ = √29² - 20²
= √841 - 400 = √441= 21 cm
Kll = PS + RS + QR + PQ = 29 + 12 + 16 + 21 = 78 cm
QS²=16²+12²
QS = √400
QS = 20
cari PQ
PQ² = 29² - 20²
PQ = √441
PQ = 21
keliling
pq + qr + rs + sp
= 21+16+12+29
= 78