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2 (pl + pt + lt) = 432 cm²
2 (12.8 + 12.t + 8.t) = 432
2 (96 + 12t + 8t) = 432
2 (96 + 20t) = 432
192 + 40t = 432
40t = 240
t = 6 cm = QU
PS ke UV pakai cara phytagoras
PS ke UV = √PQ²+QU²
= √12² + 6²
= √144 + 36
= √180
= √9.4.5
= 3.2√5
= 6√5
432 = 2 {(12×8) + (12t) + (8t)}
= 96 + 12t + 8 t
216 = 96 + 20t
20t = 216 - 96
t = 120/20
t = 6 cm
jarak PS ke UV
PU² = PQ² + QU²
= 12² + 6²
= 144 + 36
= 180
PU = √180
= 6√5 cm