pliss,,besok di kumpul pakai cara

bangun datar 1 =persegi
bangun datar 2 = segitiga
L1 = p x l
= 30 x 42 = 1.260 cm
L2 = a x t : 2
= 17 × 30 : 2
= 17 × 15 = 255 cm
L1 + L2
= 1.260+ 255
= 1.515
maaf klo salah