jawab dong please eeeeeee

Lt = ½ × (a + b) × t
Lt = ½ × (28 + 40) × 20
Lt = ½ × 68 × 20
Lt = 680 cm²

L½0 = ½ × π × r²
= ½ × 22/7 × 14 × 14
= 22 × 14
= 308

L yg diarsir
= Lt - L½0
= 680 - 308
= 372 cm²