pakai cara dikumpulinnya buat besok

L1 = 1/2 × a × t
= 1/2 × 48 × 28
= 1/2 × 1.344
= 672 cm2

L2 = p × l
= 25 × 48
= 1.200 cm2

==> 672 + 1.200 = 1.872 cm2 ( D )