tolong di jawab,besok di kumpul

L1 = p × l = 21 × 11 = 231 cm²
L2 = ½ × a × t = ½ × 21 × 8 = 84 cm²
Lttl = 231 + 84 = 315 cm²

Mapel : Matematika
Bab : bangun datar

Luas gabungan
= Luas persegi panjang + Luas segitiga
= p x l + 1/2 x a x t
= 21 cm x 11 cm + 1/2 x 21 cm x 8 cm
= 231 cm² + 84 cm²
= 315 cm²