1 sampai 5 ya tolong di jawab Pakai cara ya ._.

1) L = ½ × (a + b) × t
= ½ × (20 + 24) × 12
= ½ × 44 × 12
= 264 cm²

2) L = ½ × (a + b) × t
400 = ½ × (20 + 30) × t
400 = ½ × 50 × t
400 = 25t
t = 400 ÷ 25
t = 16 cm

3) L = ½ × (a + b) × t
720 = ½ × (a + 45) × 18
720 = 9 × (a + 45)
a + 45 = 720 ÷ 9
a + 45 = 80
a = 80 - 45
a = 35 cm