bantuin ya...pake caranya juga

Luas = 1/2 × (a + b) × t
192 = 1/2 × (40 + 24) × t
192 = 1/2 × 64 × t
192 = 32 × t
t = 192/32
t = 6 cm

Keliling = a + b + c +d
= 40 + 24 + 6 + 6
= 76 cm