tolong ya kak No 3-5 sama caranya

3) L1= 6 × 16 = 96 cm²
L2 = ½ × (a + b) × t
= ½ × (16 - 7 + 16) × (14 - 6)
= ½ × (9 + 16) × 8
= ½ × 25 × 8
= 4 × 25
= 100 cm²
Lttl = 96 + 100 = 196 cm²

4) L1 = a × t
= 45 × 17
= 765 cm²
L2 = ½ × (d1 × d2)
= ½ × 32 × 40
= 32 × 20
= 640 cm²
Lttl = 765 + 640 = 1405 cm²

5) L1 = 28 × (42 ÷ 2)
= 28 × 21
= 588 cm²
L2 = ¼ × 22/7 × 21 × 21
= 693 cm²
Lttl = 588 + 693 = 1281 cm²