Tolong ya kak 1-4 di kumpulin hari senin pake cara

1) L = ½ × ( a + b ) × t
35 = ½ × ( 8 + b ) × 5
35 × 2 = 5 × ( 8 + b )
70 = 5 × ( 8 + b )
8 + b = 70 ÷ 5
8 + b = 14
b = 14 - 8
b = 6 m

2) L = ½ × ( a + b ) × t
600 = ½ × ( 28 + 22 ) × t
600 = ½ × 50 × t
600 = 25 × t
t = 600 ÷ 25
t = 24 cm

3) Lt = ½ × ( a + b ) × t
= ½ × ( 7 + 9 ) × 5
= ½ × 16 × 5
= 40 m²
Lkrpet = p × l
= 6 × 4,5
= 27 m²
Luas yg tdk tertutup
= 40 - 27
= 13 m²

4) L = ½ × d1 × d2
= ½ × 40 × 55
= 1.100 cm²